If both the object and image are at infinite distances form a refracting telescope its magnifying power will be equal to [AMU (Engg.) 1999]

• A. The sum of the focal lengths of the objective and the eyepiece
• B. The difference of the focal lengths of the two lenses
• C. The ratio of the focal length of the objective and eyepiece
• D. The ratio of the focal length of the eyepiece and objective