Which type of action does NOT belong to shotguns?

Shotguns are classified into different action types, which refer to the mechanism by which the firearm is loaded, fired, and ejected. Semi-automatic, pump/slide action, and break/hinge action are all commonly used action types found in shotguns.

Semi-automatic shotguns use the energy from the fired cartridge to automatically cycle the action, allowing the shooter to fire multiple rounds without needing to manually operate the action between shots. Pump/slide action requires the shooter to manually cycle the action by sliding the forend back and forth to load and eject shells. Break/hinge action shotguns open at the hinge to allow for loading and unloading, typically with two barrels aligned for a double-barrel shotgun.

Lever action, however, is a mechanism primarily associated with rifles and not commonly found in shotguns. This type of action uses a lever to cycle the action, which is not characteristic of standard shotgun designs. Therefore, identifying lever action as not belonging to shotguns is correct, as it is fundamentally linked to rifle construction and operation.