Which symbol in figure G7-1 represents a Zener diode?

توضیح
Symbol 5 is the Zener diode in Figure G7-1. Symbol 1 is the field effect transistor, and symbols 4 and 11 are not the Zener-diode symbol.

Symbol 5 is the Zener diode in Figure G7-1. Symbol 1 is the field effect transistor, and symbols 4 and 11 are not the Zener-diode symbol.