Namitha is jounalist. She used her pen camera to capture the photographs of a crime that took place on the way to her office. Which of the following is the source of the electrical energy which must be used in the said camera ?

Options

A. Nickel-cadmium cells
B. Lead-acid batteries
C. Alkaline cells
D. Button cells

Answer

D

Explanation

Button cells are used in a pen camera. Hence, the correct option is