A biconvex lens of focal length 15cm is in front of a plane mirror. The distance between the lens and the mirror is 10cm. A small object is kept at distance of 30cm from the lens. The final image is
A. virtual and at a distance of 16 cm from the mirror
B. real and at a distance of 16cm from the mirror
C. virtual and at a distance of 20cm from the mirror
D. real and at a distance of 20cm from the mirror
