Explanation:

All statements are correct.

• Acknowledging that cyberspace has emerged as a crucial and challenging domain in modern warfare, the Chief of Defence Staff General Anil Chauhan released India’s first joint doctrine for cyberspace operations during a meeting of the Chiefs of Staff Committee.

About Chief of Defence Staff

• CDS is in the rank of a four-star General with salary and perquisites equivalent to a Service Chief.

• The CDS is the Principal Military Adviser to the Defence Minister on all tri-Services matters.

• He is also the Permanent Chairman, Chiefs of Staff Committee (CoSC).

• The post of CDS was created in 2019 on the recommendations of a committee of defence experts headed by Lt General DB Shekatkar.

• The Chief of Defence Staff will also head the Department of Military Affairs (DMA), to be created within the Ministry of Defence and function as its Secretary.

• CDS will not exercise any military command, including over the three Service Chiefs, so as to be able to provide impartial advice to the political leadership.

Hence option 3rd is correct.