Convex Mirror

Q. Rays parallel to the principal axis after striking the reflecting side of a convex mirror _____.

1. intersect in front of the reflecting surface
2. intersect behind the reflecting surface
3. appear to intersect in front of the reflecting surface
4. appear to intersect behind the reflecting surface

Q.

Which of these is a convex mirror?

1. 

2. 

3. 

4. 

Q. what does mirror of small aperture mean? why does the point b and p coincide in this case?