If a mirror is placed on the line AB, then which of the answer figure is the right image of the given figure?

A vertical mirror is placed, so the object at the left will appear at the right. The cirlce in the diagonal will appear at the left thus the first two options eliminated.
Also, the single circle at bottom left will appear at the top left so the third option is also not possible.

Hence, the correct answer is option 4.
Select the correct mirror image of the given combination when the mirror is placed at 'PQ' as shown below.

Select the correct mirror image of the given figure when the mirror is placed at 'AB’ as shown.

Select the correct mirror image of the given combination when the mirror is placed at MN as shown below.

Select the correct mirror image of the given figure when the mirror is placed at AB as shown.

Select the correct mirror image of the given combination when the mirror is placed at MN as shown below.

Select the correct mirror image of the given combination when the mirror is placed at 'PQ' as shown below.

Select the correct mirror image of the given figure when the mirror is placed at AB as shown.

Which of the answer figures is the exact mirror image of the given problem figure when the mirror is held at the right side?
Problem figure:

Which of the answer figures is the exact mirror image of the given problem figure when the mirror is held at the right side?
Problem figure:

Select the correct mirror image of the given combination when the mirror is placed at 'PQ' as shown below.

Images of consonants of the English alphabet (Capitals) are observed in a mirror. What is the number of images of these which do not look like their original shapes ?
Select the correct mirror image of the given figure when a vertical mirror is placed to the right of the figure.

Select the correct mirror image of the given combination when the mirror is placed at the right side.

Select the correct mirror image of the given combination when the mirror is placed at 'PQ' as shown below.

Select the correct mirror image of the given figure when the mirror is placed at 'AB' as shown.
