In the context of India's defense aircraft, the pairs have varied correctness. The Dornier-228 is indeed a maritime patrol aircraft, making the first pair correct. The second pair is incorrect because the IL-76 is not a supersonic combat aircraft; it is a military transport aircraft. The C-17 Globemaster III, recognized for its strategic airlift capabilities, correctly falls under the category of military transport aircraft, confirming the third pair's accuracy. Thus, the correct option of "only two" pertains to the accurate identification of aircraft functionalities, underlining the importance of precise knowledge in defense procurement and operational readiness, key points in UPSC examination syllabi concerning national security and military capabilities.