Which of the following is a mission set for the AH-64?

The AH-64 Apache is primarily designed as an attack helicopter, which makes air-to-air combat one of its mission sets. It is equipped with advanced avionics, weapon systems, and targeting capabilities that allow it to engage enemy aircraft effectively. The helicopter's primary function is to provide close air support to ground troops, but it can also engage other aerial threats when necessary, making it adept at air-to-air combat.

The other options represent mission sets that are not primarily associated with the AH-64. Humanitarian aid involves providing assistance and relief in crisis situations, which is typically outside the scope of an attack helicopter's core capabilities. Medical evacuation is generally conducted by specialized helicopters designed for that specific purpose, such as the MEDEVAC helicopters. Transport logistics focuses on the movement of supplies and personnel, which is a role assigned to transport helicopters rather than attack helicopters like the AH-64.