The correct option is B Some rivers originate and end in the same state.
Indian state boundaries were made by differences in language and culture, and many other things, but not at all because of the flow of rivers. A single stream can pass through many different states, and it does not follow state or city boundaries. But there are some small rivers (such as a small tributary of a large river) which originate and end in the same state. There is no rule that if a river originates in one state, then other states that interact with it downstream have less of a right to the water.