Which one of the following is not a National Action Plan on climate change?

Correct option is B

The National Action Plan on Climate Change (NAPCC) of India outlines several missions that focus on the promotion of understanding, adaptation, and mitigation strategies to deal with climate change. Among the options given:
(a) National Solar Mission: This is part of the NAPCC. The National Solar Mission aims to promote the use of solar energy for power generation and other uses to reduce the country's dependence on fossil fuels.
(c) National Mission for Green India: This is a part of the NAPCC. The Green India Mission focuses on increasing forest cover, combating climate change, and increasing forest-based livelihood opportunities.
(d) National Water Mission: This is also part of the NAPCC. The National Water Mission's goal is to conserve water, minimize wastage, and ensure its more equitable distribution both across and within states. 
Information booster:
(b) National Mission on Indian Ocean: This is not part of the NAPCC. There is no mission under the NAPCC specifically named "National Mission on Indian Ocean."
Therefore, the option that is not a part of the National Action Plan on Climate Change is (b) National Mission on Indian Ocean