Which group consists of west flowing Peninsular rivers?

Correct answer: Narmada and Tapi

The direct answer is A: Narmada and Tapi are west-flowing Peninsular rivers. Peninsular rivers arise mainly from the old Peninsular Plateau and are generally more mature, seasonal, and controlled by the plateau’s relief. Most major Peninsular rivers, such as Godavari, Krishna, and Mahanadi, flow eastward into the Bay of Bengal. Narmada and Tapi are important exceptions: they flow westward through rift valleys and enter the Arabian Sea. Option A is correct because both named rivers have this westward course. Option B is wrong because Ganga and Yamuna belong to the Himalayan river system, not the Peninsular group. Option C is wrong because Kosi and Gandak are Himalayan tributaries associated with the Ganga basin. Option D is wrong because Godavari and Krishna are Peninsular rivers but generally flow eastward into the Bay of Bengal, so they are not the west-flowing pair asked for. The phrase “west flowing” is decisive. Memory cue: among major Peninsular rivers, remember Narmada and Tapi as the famous west-flowing exceptions; both reach the Arabian Sea.