A real image of an object is to be obtained. The mirror required for this purpose is :

A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The special mirror is made up of three types of mirrors in the following order from top downwards :

The mirror which can form a magnified image of an object is :

Consider two statements A and B given below :

A : real image is always inverted

B : virtual image is always erect

Out of these two statements :

The diagrams show the appearance of crayons when placed in front of and close to two mirrors A and B, turn by turn.

(a) Which mirror is convex?

(b) Which mirror is concave ? Give reasons for your choice.