Which of the following is not a combat aircraft mentioned?

The correct answer is C, Sentinel, because it is primarily a surveillance and reconnaissance aircraft rather than a combat aircraft. The Sentinel R1, specifically, is designed for intelligence-gathering operations, using its advanced radar systems to monitor and assess battlefield situations from a safe distance. Unlike combat aircraft, which are equipped for engaging in aerial combat or ground attacks, the Sentinel plays a vital role in providing situational awareness and supporting decision-making through reconnaissance.

In contrast, the Typhoon and Lightning are both combat aircraft. The Typhoon is a multi-role fighter aircraft capable of air-to-air and air-to-ground operations, while the Lightning, referring to the F-35 Lightning II, is a stealth multirole fighter designed for a variety of combat missions including strike, air superiority, and intelligence, surveillance, and reconnaissance.

Thus, identifying Sentinel as not being a combat aircraft clarifies the distinction between various roles that military aircraft serve within the RAF and highlights the unique capabilities of each type.