Which of the following represents explosive shells hurled at enemies by catapults?

• A. Game cards
• B. Inoculation
• C. Artillery shells
• D. Mechanical clock

Answer: (C)

Explosive projectiles used in siege warfare are called artillery shells. These are the ammunition designed to explode on impact, increasing damage against enemies or fortifications when fired from large launchers. Catapults are classic siege engines that hurl missiles at targets; when the prompt describes an explosive projectile used in that way, the term that fits is artillery shells. Other options don’t refer to weapons or ammunition at all—game cards belong to games, inoculation is a medical procedure, and a mechanical clock is a timekeeping device.