Option 1 states that the Indian Air Force has bases in many friendly countries. However, this statement is incorrect. The Indian Air Force primarily operates within the borders of India and does not have permanent military bases in other countries. While it may participate in joint military exercises or collaborations with other countries, it does not have official bases in those locations.

Option 2 claims that the Indian Air Force does not carry out joint exercises with any country. This statement is incorrect. The Indian Air Force regularly participates in joint exercises with various countries, including the United States, Russia, and several other nations. These exercises are aimed at improving interoperability, sharing knowledge and experiences, and enhancing military cooperation.

Option 3 correctly states that the Indian Air Force has a separate Maintenance Command. The Indian Air Force is structured into various commands, and one of them is specifically dedicated to maintenance operations. The Maintenance Command is responsible for the repair, servicing, and maintenance of aircraft, equipment, and infrastructure, ensuring operational readiness of the force.

Option 4 claims that no officer has ever been elevated to the rank of Marshal of the Indian Air Force. This statement is incorrect. In fact, the Indian Air Force has had officers who have been promoted to the honorary rank of Marshal of the Indian Air Force. This