A Lens of Focal Length 40 Mm Is Used as a Magnifier

Multiple Choice

A lens of focal length 40 mm is used as a magnifier. The object being viewed is 5.3 mm long, and is positioned at the focal point of the lens. The user of the magnifier has a near point at 25 cm. What
Is the angular magnification of the magnifier?

A) 6.3
B) 8.1
C) 6.9
D) 7.5
E) 5.6