One way in which the operation of an n-p-n transistor differs from that of zip-n-p

• A. the emitter junction is reverse biased in n-p-n.
• B. the emitter junction injects minority carriers into base region of the p-n-p
• C. the emitter injects holes into the base of the p-n-p and electrons into the base region n-p-n
• D. the emitter injects holes into the base of n-p-n