Which one of the following (Tributary – River) is NOT correctly matched?

1. A

   Manjra – Godavari

   (a) Manjra – Godavari. This option claims that Manjra is a tributary of the Godavari river. This pairing is geographically correct as the Manjra is one of the important right-bank tributaries of the Godavari.

2. B

   Hemavathi – Kaveri

   (b) Hemavathi – Kaveri. This option claims that Hemavathi is a tributary of the Kaveri river. This pairing is correct because the Hemavathi is a prominent left-bank tributary of the Kaveri flowing through Karnataka.

3. C

   Malaprabha – Krishna

   (c) Malaprabha – Krishna. This option claims that Malaprabha is a tributary of the Krishna river. This pairing is correct as the Malaprabha originates in the Western Ghats and joins the Krishna.

4. D

   Pranhita – Mahanadi

   (d) Pranhita – Mahanadi. This option claims that Pranhita is a tributary of the Mahanadi river. This pairing is incorrectly matched because the Pranhita is actually the largest tributary of the Godavari river, formed by the confluence of the Wardha and Wainganga rivers, making this the correct choice for the uncorrectly matched pair.

Summary. Official key is (d) Pranhita – Mahanadi. The question asks to identify the incorrectly matched tributary and main river pair among the given options. Options (a), (b), and (c) correctly pair the Manjra with the Godavari, Hemavathi with the Kaveri, and Malaprabha with the Krishna respectively. Option (d) incorrectly associates the Pranhita river with the Mahanadi instead of its actual parent river, the Godavari. Therefore, option (d) is the right answer to the question.