Explanation:

First option is correct.

Karwar, one of the largest naval bases of India, lies in Karnataka.
Karwar lies on the west coast of Southern India at the mouth of the Kali river.

More Information-

Project Seabird Phase II in Karwar, Karnataka on 9 June 2014 got environment clearance by the Union Ministry of Environment and Forests.

Project Seabird is one of the largest naval bases of India and will be completed in two phases. It houses various warships including India's largest warship and aircraft carrier INS Vikramaditya.