Which of the following is/are correctly matched in terms of equivalent rank in the three services of Indian Defence forces? Army : Airforce : Navy.

1. Brigadier : Air Commodore : Commander — Incorrect. Brigadier and Air Commodore are equivalent, but the Navy equivalent is Commodore, not Commander.

2. Major General : Air Vice Marshal : Vice Admiral — Incorrect. Major General equals Air Vice Marshal and Rear Admiral; Vice Admiral is a higher rank.

3. Major : Squadron Leader : Lieutenant Commander — Correct. These are equivalent mid-level officer ranks in Army, Air Force and Navy respectively.

4. Lieutenant Colonel : Group Captain : Captain — Incorrect. Lieutenant Colonel equals Wing Commander and Commander; Group Captain/Captain are higher ranks.

Therefore, only 3 is correctly matched.