Explanation:

CMS (Convention on the Conservation of Migratory Species of Wild Animals)

• It is an intergovernmental treaty under the UNEP (United Nations Environment Programme)- popularly known as Bonn Convention. 

• It was signed in 1979 and in force since 1983.

• As of 1st March 2022, the CMS has 133 Parties.

• India has also been a party to CMS since 1983.

Aim

• It aims to conserve terrestrial, marine and avian migratory species throughout their range.

• It lays the legal foundation to conduct conservation measures on a global scale. 

Two appendices under CMS

• Appendix I lists ‘Threatened Migratory Species’.

• Appendix II lists ‘Migratory Species requiring international cooperation’.

India and the CMS

• India has signed a non-legally binding Memorandum of Understanding (MoU) with CMS on conservation and management of Siberian Cranes (1998), Marine Turtles (2007), Dugongs (2008), and Raptors (2016).

Hence option 2nd is correct.