A plane mirror( M1 ) and a concave mirror( M 2 of focal length10 cm are arranged as shown in ) figure. An object is kept at origin. Answer the following questions. (consider image formed by single reflection in all cases)
- A plane mirror (M1) is placed at an angle of 45 degrees with the x-axis.
- A concave mirror (M2) with a focal length of 10 cm is positioned such that its optical axis is along the y-axis.
- The distance between the optical axis of M2 and the point where M1 intersects the x-axis is 10 cm.
- The vertical distance between M2 and the x-axis is 20 cm.
- An object is kept at the origin (O).
- The questions assume a single reflection in all cases.

The coordinates of image formed by plane mirror are (a) (20 cm, 0) (b) (10 cm, 60 cm) (c) (10 cm, 10 cm) (d) (10 cm, 10 cm)