For a concave mirror, when the object is at the centre of curvature, the place and nature of the image formed is :

1. at focus, real, inverted
2. at focus, virtual, inverted
3. at centre of curvature, real, inverted, diminished
4. at centre of curvature, real, same size as that of the object

For a concave mirror, when the object is at focus, the size of the image formed is:

1. magnified
2. highly magnified
3. diminished
4. of the same size

For a convex mirror, when the object is in front of the mirror, the image formed is :

1. real, upright and magnified
2. real, inverted and diminished
3. virtual, upright and magnified
4. virtual, upright and diminished

The wrong rule of sign convention is :

(i) All distances are measured from the centre of curvature of the mirror taken as origin.

(ii) The distances measured along the principal axis in the direction of incident light are positive.

(iii) The distances above the principal axis are taken positive.

1. (i)
2. (ii)
3. (iii)
4. both (i) and (ii)