A student was given the following suggestions by his classmates for performing the experiment on finding the focal length of a convex lens :
(A) Select any object very far away from the laboratory window
(B) Select a well illuminated object far (but not very far) from the laboratory window
(C) Keep all the lights of the laboratory on
(D) Place the lens between the object and the screen
(E) Place the screen between the object and the lens
(F) Obtain the sharpest image of the object on the screen
He can perform the experiment better by following the suggestions :

Options

A. A, D, F
B. B, C, E
C. C, F, B
D. D, F, B

Answer

D

Explanation

NA