Match the following.

List-I	List-II
a. Germanium at 0 K	1. n-type semiconductor
b. Germanium at room temperature	2. p-type semiconductor
c. Germanium doped with indium	3. Insulator
d. Germanium doped with arsenic	4. Intrinsic semiconductor

A. a-1, b-2, c-3, d-4

B. a-4, b-3, c-2, d-1

C. a-3, b-4, c-2, d-1

D. a-4, b-3, c-1, d-2

Answer: Option C