Which of the following efforts has the Government of India initiated…

The correct answer is Option (4) → Integrated Ganga Conservation Mission

Option (1) Ganga Action Plan — Incorrect. The Ganga Action Plan is an older river-cleaning programme launched in the 1980s. It came long before 2014, so it falls outside the post-2014 period.

Option (2) National River Conservation Plan — Incorrect. The National River Conservation Plan grew out of the Ganga Action Plan in the 1990s to cover other rivers. It is an earlier scheme from before 2014.

Option (3) National Lake Conservation Plan — Incorrect. The National Lake Conservation Plan deals with the cleaning of lakes and dates from the early 2000s. It is neither a Ganga mission nor a step taken since 2014.

Option (4) Integrated Ganga Conservation Mission — Correct. Since 2014 the Government of India has worked for clean water and a healthy environment through the Integrated Ganga Conservation Mission, also called Namami Gange. It aims to bring balance, structure and quality to India's ecology.