A compound microscope is used to enlarge an object kept at a distance 0.03m from it?s objective which consists of several convex lenses in contact and has focal length 0.02m. If a lens of focal length 0.1m is removed from the objective, then by what distance the eye-piece of the microscope must be moved to refocus the image

• A.            2.5 cm                                     
• B.            6 cm
• C.            15 cm                                      
• D.            9 cm