From the following Relative amplitude vs Frequency plot, identify the type of noise which the sections A, B, C & D depict

(i) Thermal Noise (ii) Power line pick up
(iii) Power supply (EPC) switching noise (iv)1/f noise

A

A-i, B-ii, C-iii, D-iv

B

A-ii, B-i, C-iv, D-iii

C

A-iv, B-ii, C-iii, D-i

D

A-iii, B-iv, C-ii, D-i