Which of the following statements about the human eye and the camera is correct?

A. both form virtual image of objects
B. the image formed by the eye is upright in the retina while that formed by the camera is inverted on the film
C. the inside of both of them is blackened to absorb unwanted light
D. the focal length of both eye lens and the camera lens can be varied

Correct Answer: Option C

C. the inside of both of them is blackened to absorb unwanted light