Question

The least distance of distinct vision for a young adult with normal vision is about
(a) 25 m. (b) 2.5 cm. (c) 25 cm. (d) 2.5 m

NCERT Class X
Science - Science

Chapter _The Human Eye and the Colourful World

Answer 1

25 cm
is the least distance of distinct vision... for a young adult.

for children it is less.  for aged persons it may increase..

This is the minimum distance for a person to be able to see clearly and distinctly without distortion two close points..

Answer 2

it is 25cm option (c)