Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R

Assertion A: Choice-based Credit System (CBCS) is adopted out of the need for flexibility in the education system so that students, depending upon their interests and aims, can choose interdisciplinary, intra-disciplinary and skill-based courses.

Reason R: The majority of Indian higher education institutions have been following a marks or percentage-based evaluation system, which obstructs the flexibility for the students to study the subjects/courses of their choice and their mobility to different institutions.

In light of the above statements, choose the most appropriate answer from the options given below