Which of the following is the concave lens?

Which of the following is the converging lens?

Which of the following is the diverging lens?

Focal point, F for the convex lens is a point where light rays parallel to the principle axis converge after passing the lens. True or false?

Focal point, F for the concave lens is when light diverge after passing through the lens are extrapolated backwards and intersect at a point. True or false