Which of the following are primary types of artillery ammunition?

The primary types of artillery ammunition are high-explosive, smoke, illumination, and precision-guided munitions. High-explosive rounds are designed to create a significant blast effect, useful for destroying enemy fortifications or inflicting casualties. Smoke rounds are used to create a smoke screen, providing concealment during operations. Illumination rounds function to light up areas during nighttime operations, ensuring visibility for targeting or reconnaissance. Precision-guided munitions allow for accurate targeting, reducing collateral damage and increasing effectiveness against specific targets.

This classification reflects the fundamental roles that artillery plays in warfare, focusing on explosive impact, battlefield obscuration, visibility enhancement, and precision strikes, which are critical for successful military operations. The other options include items not classified as artillery ammunition or do not encompass the full spectrum of ammunition types relevant to artillery.