Q. 40 Match items in Group 1 with items in Group 2, most suitably.
Group 1 Group 2
P. LED 1. Heavy doping
Q. Avalanche photo diode 2. Coherent radiation
R. Tunnel diode 3. Spontaneous emission
S. LASER 4. Current gain
(A) P – 1, Q – 2, R – 4, S – 3
(B) P – 2, Q – 3, R – 1, S – 4
(C) P – 3 Q – 4, R – 1, S – 2
(D) P – 2, Q – 1, R – 4, S – 3
Answer: (C)
Explanation:
