Which of the following is NOT a type of fuze?

The correct answer is Expandable, as it is not recognized as a standard type of fuze used in munitions. Fuzes serve critical roles in the detonation mechanisms of explosives and are classified based on their functioning or triggering methods.

Proximity fuzes detonate upon detecting an object within a certain range, making them essential for airburst and air-to-ground munitions. Delayed fuzes are designed to activate after a set period, allowing the munition to penetrate a target or reach a desired position before detonation. Multi-option fuzes provide flexibility, as they can be set to function in various modes depending on the mission requirements, enhancing operational effectiveness.

In contrast, an expandable fuze does not fit into the established categories and represents a misunderstanding of fuze types commonly utilized in military applications.