Which of the following statements about the compound microscope and astronomical telescope is (are) correct? i. the final image of a compound microscope is located at infinity ii. the final image of the astronomical telescope is always erect iii. the objective lens of a compound microscope has a very short focal length
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A.
i only -
B.
ii only -
C.
iii only -
D.
i and iii -
E.
ii and iii