The correct option is D Both options (a) and (b) are true.
Peninsular rivers have a fixed course as they originate in the Peninsular plateau and central highland. Himalayan rivers flow across young fold mountains and are still young and active. Peninsular rivers flow through one of the oldest plateaus of the world and have reached maturity. Due to the hard rocky surface of the Peninsular plateau, there is little scope for the formation of meanders. Due to the reduction in the speed of water flow, meanders are formed when Himalayan rivers enter the plains.