Select the NEMA or industry standard symbol for a momentary switch used to release a door magnet.

The selection of option C as the NEMA or industry standard symbol for a momentary switch used to release a door magnet is accurate because the correct symbol specifically represents a momentary action switch. This type of switch is designed to operate only when the actuator is pressed, which is ideal for applications like releasing a door magnet—where the switch needs to provide a transient signal to disengage the locking mechanism.

The design of the symbol itself is standardized to ensure consistency across different devices and installations, making it easily recognizable in various electrical schematics. The momentary action characteristic is crucial in its use, reflecting the intended function of briefly interrupting the power to the door magnet while the switch is activated.

In contrast, options that do not correspond to this design may represent different types of switches or controls, such as toggles or latching switches that do not fit the specific need for a temporary activation mechanism in this context. Thus, understanding the nuances of these symbols helps in correctly identifying the functionality they are meant to convey in electrical diagrams and applications.