The near point of a normal human eye is :

The lowest distance between the object and the eye at which it may be viewed clearly without effort is known as the near point of the eye. This distance is 25 cm for a normal human eye. The far point of the eye refers to the distance at which the eye can clearly see objects. The usual human eye's far point is infinity.

A human eye's near point is 25cm, which is described as the shortest object distance that an average eye can accommodate, or the distance at which the picture falls on the retina. Hence, the correct answer is option D, i.e., 25cm.