Explanation:

- Option 1: India and Russia

- India and Russia conduct a different major annual exercise known as "INDRA," which includes both the army and navy.

- Option 2: Russia and Pakistan

- Correct Answer: DRUZBA is the name of a joint military exercise conducted between Russia and Pakistan. It is a series of exercises aimed at strengthening military cooperation and understanding between the two countries.

- Option 3: India and France

- The military exercise between India and France is known as "Varuna" for the navy, "Garuda" for the air force, and "Shakti" for the army.

- Option 4: China and Pakistan

- China and Pakistan conduct their joint military exercises, known as "Shaheen" for the air forces and "Warrior" series for other branches.

DRUZBA is specifically associated with joint efforts and exercises between Russia and Pakistan, focusing on counter-terrorism and tactical drills.