The question asks about the current Chief of the Defence Staff (CDS) of India. The Chief of the Defence Staff is a high-ranking position in the Indian military and serves as the professional head of the Indian Armed Forces, as well as the principal military adviser to the Government of India.
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Hence, the correct answer is General Anil Chauhan.
Additional Information: The position of the Chief of the Defence Staff was created to provide a unified voice for the Indian military establishment, improve jointmanship and synergies between the Army, Navy, and Air Force, and to facilitate integration with the Ministry of Defence.
The DDR&D deals with research and development of defence technologies, systems, and equipment. DDR&D stands for: