A norml eye is unable to see objects at a distance less than distance of distinct vision. If is because

Options

A. the focal length of the eye-lense is equal to the distance of distinct vision
B. the distance between eye-lense and retina is equal to distance of distinct vision.
C. the eye-lens cannot decreases its focal length beyond a limit .
D. the eye-lense cannot decreases its distance from the retina beyond a limit.

Answer

C