In cases of real images formed by a thin convex lens, the linear magnification is (I) directly proportional to the image distance, (II) inversely proportional to the object distance, (III) directly proportional to the distance of image from the nearest principal focus, (IV) inversely proportional to the distance of the object from the nearest principal focus. From these the correct statements are :
(A) (I) and (II) only.
(B) (III) and (IV) only
(C) (I), (II),(III) and (IV) all.
(D) None of (I), (II), (III) and (IV).
