The correct answer is option 2: Godavari.

Indravati is a tributary of the Godavari River. A tributary is a smaller river or stream that flows into a larger river. In this case, the Indravati River joins the Godavari River. The Godavari River is one of the longest rivers in India and is often referred to as the Dakshin Ganga, meaning the Ganga of the South. It originates in the Western Ghats of Maharashtra and flows eastwards across several states, including Telangana and Andhra Pradesh, before emptying into the Bay of Bengal. The Indravati River is a major tributary of the Godavari, adding to its flow and contributing to the overall drainage system of the region.