Some pairs of devices and associated energy changes are given below.
1. Electric generator ⟺ Mechanical to electrical
2. Electric motor ⟺ Electrical to mechanical
3. Diesel engine ⟺ Light to electrical
4. Solar cell ⟺ Chemical to mechanical
Which of the above pair/s is/are correctly matched?

A. Only 1 and 2

B. Only 1 and 3

C. Only 2 and 4

D. Only 3 and 4

Answer: Option A