Which symbol in figure G7-1 represents an NPN junction transistor?

An NPN bipolar junction transistor (BJT) is represented by a symbol with three leads: a base, a collector, and an emitter. The key identifier is the arrow on the emitter lead. Symbol 2 shows this arrow pointing outward, away from the vertical base line. A classic and highly effective mnemonic for identifying the NPN transistor is 'Not Pointing iN', meaning the emitter arrow points away from the base. In contrast, a PNP transistor has the emitter arrow 'Pointing iN Proudly' toward the base.