For reading small letters with a lens

Options

A. one has to keep a convex lens at a distance between F and 2F from the book.
B. one has to keep a concave lens at a distance less than the focal length from the book.
C. one has to keep a concave lens at a distance between F and 2F from the book.
D. One has to keep a convex lens at a distance less than the focal length from the book.

Answer

d