The near point of a hypermetropic eye is 75 cm from the eye. What is the power of the lens required to enable him to read clearly a book at 25 cm from the eye?

Question

$\begin{array}{1 1} (a)\; 2 D \\ (b)\; -2D \\ (c)\; 2.66 D \\ (d)\; -2.66D \end{array}$