The line of symmetry of a rectangle are

1. its four sides
2. its two diagonals
3. the bisectors of its four interior angles
4. the lines joining the midpoints of its opposite sides.

ABCD is a kite in which AB = AD and CB = CD. The kite is symmetrical about

1. the diagonal AC
2. the diagonal BD
3. both the diagonals AC and BD
4. the lines joining the mid-points of its opposite sides.

Which amongst the following letters has the highest number of lines of symmetry?

1. A
2. K
3. X
4. N

Which of the following letters of the English alphabet does not possess a point symmetry?

1. C
2. N
3. S
4. X