Explanation:

Recently, a 2 MW Solar Photovoltaic Plant was commissioned at INS Kalinga, Visakhapatnam. The plant is the largest in the Eastern Naval Command (ENC) and has an estimated life of 25 years. INS Kalinga has taken significant strides in Green Initiatives since it's setting up in the early 1980s, including afforestation, numerous plantation drives, coastal cleanup drives and protection of the Geo-Heritage site “Erra Matti Dibbalu”. Erra Matti Dibbalu also called as Red Sand Hills, a notified National Geo-heritage Monument, is situated at the outskirts of Visakhapatnam City. It is located very near to the Bay of Bengal and is one of Visakhapatnam's many heritage sites. Hence option 2nd is correct.