An astronimical telescope has an angular magnification of magnitude 5 for distant objects. The separation between the objective and the eye-piece is 36 cm and the final image is formed at infinity. The focal length `f_(0)` of the objective and the focal length `f_(0)` of eye-pieces are

Options

A. `f_(0) = 45 cm, f_(e) = - 9 cm `
B. `f_(0) = 7.2 cm, f = 5 cm `
C. `f_(0) = 50 cm, f_(e) = 10 cm `
D. `f_(0) = 30 cm, f_(e) = 6 cm `

Answer

4