Which of the following is a type of ammunition used for the m203?

The correct response identifies a type of ammunition specifically designed for use with the M203 grenade launcher. The HE Dual Purpose round is a versatile munition that serves both anti-personnel and anti-material purposes. It contains a high-explosive charge capable of producing significant fragmentation effects, making it effective against both troops and light vehicles.

This round's dual-purpose capability allows it to be used in various combat situations, thus giving operators flexibility in their choice of munitions when engaging different types of targets. The versatility of HE Dual Purpose ammunition is a significant advantage in combat scenarios, where different types of threats may need to be addressed.

While other choices such as High Explosive, Smoke, and Illumination are indeed types of ammunition used for the M203, the HE Dual Purpose is prominent for its specific design to engage multiple target types, which is key in tactical situations.