Which of the following statements is FALSE?
1. Focal length of a convex lens is positive.
2. Focal length of a concave lens is negative.
3. All measurements to the right of the optic centre are positive.
4. All measurements to the left of the optic centre are positive.

A

Statement 1 only

B

Statement 2 only

C

Statement 3 only

D

Statement 4 only