The National Adaptation Fund for Climate Change is a fund that aims to provide financial assistance for national and state-level activities related to climate change adaptation measures. Therefore, option 1 is correct as it accurately describes the purpose of the fund.
Option 2 states that the scheme has been taken as a Central Sector Scheme. This means that it is implemented and funded by the central government of India. This statement is correct, as the fund is indeed implemented by the central government.
Option 3, however, states that the Indian Council of Agricultural Research is the national implementing entity for the fund. This statement is incorrect. The correct implementing entity for the fund is the National Adaptation Fund for Climate Change (NAFCC). Therefore, option 3 is the correct answer to the question.
Option 4 states that the scheme has been in force since 2015-2016. This statement is correct, indicating that the fund has been operational since the mentioned year.
In conclusion, the incorrect statement about the National Adaptation Fund for Climate Change is option 3, which wrongly identifies the implementing entity for the fund. The correct implementing entity is the NAFCC.