Cetuximab will be administered.

Bevacizumab will be administered.

5-fluorouracil will be administered as chemotherapy regimen.

Leucovorin calcium/Levoleucovorin will be administered as chemotherapy regimen.

Irinotecan will be administered as chemotherapy regimen.

PFS is defined as the time from randomization until the date of objective disease progression or death (due to any cause), whichever comes first, as assessed by investigator.

DoR is defined as time from the date of first documented response (CR or PR) until the date of documented progression or death, whichever comes first, for participants who have PR or CR as assessed by BICR.

DoR is defined as time from the date of first documented response (CR or PR) until the date of documented progression or death, whichever comes first, for participants who have PR or CR as assessed by investigator.

TTR is defined as the time from the date of randomization to the date of first documentation of a response (PR or CR) prior to any disease progression or subsequent systemic anti-cancer therapy or curative-intent procedure, for participants who have PR or CR as BOR, as assessed by BICR.

TTR is defined as the time from the date of randomization to the date of first documentation of a response (PR or CR) prior to any disease progression or subsequent systemic anti-cancer therapy or curative-intent procedure, for participants who have PR or CR as BOR, as assessed by investigator.

PFS2 is defined as the time from randomization until the date of second objective disease progression, after initiation of subsequent systemic anticancer therapy, based on investigator assessment or death, whichever comes first.

DCR is defined as the percentage of randomized participants achieving CR, PR, or stable disease (with a minimum duration of 7 weeks) as defined by BICR using RECIST v1.1.

DCR is defined as the percentage of randomized participants achieving CR, PR, or stable disease (with a minimum duration of 7 weeks) as assessed by investigator.

Time to treatment failure is defined as time from randomization to discontinuation of therapy for any reason including death, progression, toxicity, or initiation of new anticancer therapy.

Curative resection (R0) rate is defined as the percentage of randomized participants who underwent curative-intent surgery where the residual tumor classification was R0.

An AE is any untoward medical occurrence in a participant administered a pharmaceutical (investigational or non investigational) product. An AE does not necessarily have a causal relationship with the treatment. Severity of AEs will be graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE) v5.0. by using standard grades as follows: Grade 1: Mild; asymptomatic or mild symptoms; Grade 2: Moderate; minimal, local or noninvasive intervention indicated; Grade 3: Severe but not immediately life threatening; hospitalization or prolongation of hospitalization indicated; Grade 4: Life-threatening consequences; and Grade 5: Death related to AE.

Participants with abnormalities in laboratory values (such as serum chemistry, hematology) will be reported.

The EORTC QLQ-C30, is a self-administered, 30-item questionnaire measuring the health-related quality of life (HRQoL) of participants with cancer. EORTC QLQ-C30 includes 5 functional scales, 3 symptom scales, a global health status/quality of life scale, and 6 single items. Responses to items 1-28 are rated on a 4-point Likert response scale ranging from 1 "Not at all" to 4 "Very much." Two global health status items are rated on a 7-point numeric rating scale from 1 "Very Poor" to 7 "Excellent." Higher scores indicate greater functioning, better global health status, and more severe symptoms.

Time to worsening in symptoms and functioning as measured by EORTC QLQ-C30 score will be reported. The EORTC QLQ-C30, is a self-administered, 30-item questionnaire measuring the health-related quality of life (HRQoL) of participants with cancer. EORTC QLQ-C30 includes 5 functional scales, 3 symptom scales, a global health status / quality of life scale, and 6 single items. Responses to items 1-28 are rated on a 4-point Likert response scale ranging from 1 "Not at all" to 4 "Very much." Two global health status items are rated on a 7-point numeric rating scale from 1 "Very Poor" to 7 "Excellent." Higher scores indicate greater functioning, better global health status, and more severe symptoms.

The EORTC QLQ-CR29, is a self-administered, 29-item questionnaire measuring the HRQoL of participants with colorectal cancer. The QLQ-CR29 includes items that evaluate symptoms (gastrointestinal, urinary, pain, and others) and functional areas (sexual, body image, weight, and anxiety) that are associated with colorectal cancer and its treatments. Responses are rated on a 4-point Likert response scale ranging from 1 "Not at all" to 4 "Very much." All scores are linearly converted into a scale from 0 to 100. Higher scores indicate greater functioning and more severe symptoms.

Time to worsening in symptoms and functioning as measured by EORTC QLQ-CR29 will be reported. EORTC QLQ-CR29, is a self-administered, 29-item questionnaire measuring the HRQoL of participants with colorectal cancer. The QLQ-CR29 includes items that evaluate symptoms (gastrointestinal, urinary, pain, and others) and functional areas (sexual, body image, weight, and anxiety) that are associated with colorectal cancer and its treatments. Responses are rated on a 4-point Likert response scale ranging from 1 "Not at all" to 4 "Very much." All scores are linearly converted into a scale from 0 to 100. Higher scores indicate greater functioning and more severe symptoms. Change from baseline in the EORTC QLQ-CR29 score will be reported.

EORTC item 168 is a single item used to measure the overall impact of treatment side effects. Responses are rated on a 4-point Likert response scale ranging from 1 "Not at all" to 4 "Very much. Higher scores indicates severe symptoms.