Relapse: occurrence of acute episode of one or more new symptoms or worsened symptoms of Multiple sclerosis (MS), not associated with fever/infection and lasting 24 hours after stable 30 days period. Confirmed relapse: increase from baseline at least 0.5 point Expanded Disability Status Scale (EDSS) score or increase of one point in one, two or three Functional Systems (FS), excluding bowel/bladder and cerebral/mental FS. EDSS and FS scores are based on neurological examination for assessing its impairment in MS. Among eight FS, seven are ordinal clinical rating scales ranging from 0-5 or 6 with higher scale indicates overall functional impairment assessing Visual,Brain Stem,Pyramidal,Cerebellar,Sensory, Bowel/Bladder and Cerebral functions. Rating individual FS scores is used to rate EDSS in conjunction with observations and information concerning gait and use of assistance. EDSS is ordinal clinical rating scale ranging from 0 (normal neurological examination) to 10(death due to MS).

Full analysis set (FAS) included all participants randomized in the study.

The FSIQ-RMS is a 20-item Patient Reported Outcomes (PRO) measure to evaluate fatigue-related symptoms and the impacts of those symptoms on the lives of people. The FSIQ-RMS symptom domain (FSIQ-RMS-S) consists of seven items assessing fatigue-related symptoms daily with a recall period of 24 hours measured on an 11-point numeric rating scale; the (normalized) symptom domain score ranges from 0 to 100 with a higher score indicating greater fatigue. This domain was completed on 7 consecutive days. A negative change from baseline indicates an improvement in fatigue symptoms.

FAS included all participants randomized in the study. Here 'N' (number of participants analyzed) included all participants who were evaluable for this outcome measure with available baseline and at least one post-baseline assessment.

CUALs was calculated as sum of new Gadolinium-enhanced (Gd+) T1 lesions plus new or enlarging T2 lesions (without double-counting of lesions) from baseline based on the Magnetic resonance imaging (MRI) scans up to Week 108. Average number of lesions per year were reported.

FAS included all participants randomized in the study. Here 'N' (number of participants analyzed) signifies number of participants evaluable for this outcome measure.

A 12-week CDA was defined as an increase of at least 1.5 in Expanded Disability Status Scale (EDSS) for participants with a baseline EDSS score of 0.0 or an increase of at least 1.0 in EDSS for participants with a baseline EDSS score of 1.0 to 5.0, or an increase of at least 0.5 in EDSS for participants with a baseline EDSS score greater than or equal to (>=) 5.5, which was confirmed after 12 weeks. Baseline EDSS was defined as the last EDSS score recorded prior to randomization. EDSS is an ordinal clinical rating scale ranging from 0 (normal neurological examination) to 10 (death due to MS).

FAS included all participants randomized in this study.

A 24-week CDA was defined as an increase of at least 1.5 in EDSS for participants with a baseline EDSS score of 0.0 or an increase of at least 1.0 in EDSS for participants with a baseline EDSS score of 1.0 to 5.0, or an increase of at least 0.5 in EDSS for participants with a baseline EDSS score >= 5.5, which was confirmed after 24 weeks. Baseline EDSS was defined as the last EDSS score recorded prior to randomization. The EDSS is an ordinal scale ranging from 0 (normal neurological exam) to 10 (death to MS).

FAS included all participants randomized in this study.