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Identify the semiconductor devices whose characteristics are given below, in the order (a), (b), (c), (d):
(a) Exponential rise in forward bias, almost zero reverse current → Simple p-n junction diode
(b) Normal forward behavior, sharp rise in reverse current at breakdown voltage → Zener diode
(c) Curve shifts to fourth quadrant under illumination (delivers power) → Solar cell
(d) Resistance decreases as light intensity increases → LDR
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