All of the following statements are correct except [Manipal MEE 1995]

• A.            The total length of an astronomical telescope is the sum of the focal lengths of its two lenses
• B.            The image formed by the astronomical telescope is always erect because the effect of the combination of the two lenses is divergent
• C.            The magnification of an astronomical telescope can be increased by decreasing the focal length of the eye-piece
• D.            The magnifying power of the refracting type of astronomical telescope is the ratio of the focal length of the objective to that of the eye-piece