Study to Evaluate the Effectiveness and Safety of Ozanimod Compared to Fingolimod in Children and Adolescents With Relapsing Remitting Multiple Sclerosis

Inclusion Criteria: * Has a diagnosis of multiple sclerosis (MS) as defined by the 2017 revision of the McDonald Criteria with a relapsing remitting course of disease. * Meets at least 1 of the following criteria for disease activity: i) At least 1 MS relapse/attack in the previous year prior to screening. ii) At least 2 MS relapses/attacks in the previous 2 years prior to screening. iii) Evidence of 1 or more gadolinium-enhancing (GdE) lesions on magnetic resonance imaging (MRI) within 6 months prior to baseline (including screening MRI). \- Has an Expanded Disability Status Scale (EDSS) score of 0 to 5.5, both inclusive. Exclusion Criteria: * Diagnosis of progressive forms of MS. * Active or chronic disease of the immune system other than MS. * Clinically relevant cardiovascular, hepatic, neurological other major systematic disease. * Other protocol-defined Inclusion/Exclusion criteria apply.