The correct option is
D Tapping key and switch respectively
The symbol shown in the figure represents a tapping key and a switch respectively.
Tapping key: a light flexible metallic strip provided with contacts so that when it is momentarily pressed an electric circuit is made or broken and when it is released the opposite effect is automatically produced.
Switch: a switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit, interrupting the electric current or diverting it from one conductor to another.