Girna River is a tributary of which major river?

Correct answer: Tapi

Girna is a tributary of the Tapi, also called the Tapti, so option A is correct. The Girna rises in the western part of Maharashtra and flows through the Khandesh region before joining the Tapi river system. This is a useful example of how tributaries help identify a river basin: Girna belongs to the Tapi basin, not to the Godavari or Krishna basins, even though all are associated with peninsular India. The Mahi is another west-flowing river but has its own independent basin and does not receive the Girna. Therefore, the geographical relationship asked in the question is Girna–Tapi, making A the unambiguous answer.