Question: What prefix was removed with government's tranistion to a Republic in 1950 from the fourth ranking airforce of the world, which includes No. 48 Squadron IAF assigned to Maintenance Command and participates in operations involving air, land and airdrop of troops, equipment, supplies, and support or augment special operations forces, when appropriate.
Sentence (from "Indian Air Force"): Its primary mission is to secure Indian airspace and to conduct aerial warfare during armed conflict.
Relevant evidence: No