Option 3 is correctly matched as it represents equivalent ranks across the three services of the Indian Defence Forces: Major in the Army corresponds to Squadron Leader in the Air Force and Lieutenant Commander in the Navy. This equivalence is crucial to understanding the hierarchical structure of the armed forces, which adheres to a systematic ranking system ensuring operational coordination among services. The other options are incorrect due to mismatches in ranks, highlighting the importance of precise knowledge of military organizational structures, a key aspect of general studies for UPSC candidates.