Match List-I (Diode) with List-II (Applications) and select the correct answer using the code given below the lists—
List-I
(a) Varactor diode
(b) Tunnel diode
(c) Photodiode
(d) Zener diode
List-II
1. To change auxillary storage batteries
2. Best choice for silicon ICs
3. Suitable for ICs of III-V
4. High frequency switching circuit Codes: