The compound microscope consists of two convex lenses of 5cm and 20cm focal length, then which of them will be object lens and eye piece?
(A) Object lens with 20cm focal length and eye piece with 5cm focal length
(B) Object lens with 5cm focal length and eye piece with 20cm focal length.
(C) Both should have 20cm focal length.
(D) Both should have 5cm focal length
