An eyeglass lens is cut with one surface having a radius R1 and the other surface having a radius R2, with R1 < R2. Both positive radii are measured from the same side with R1 being the side closer to the eye. Is this convex-concave lens a converging lens or a diverging lens?

a. This is a converging lens.

b. This is a diverging lens.

c. This can be either a converging or diverging lens, as more information is needed for a final determination.

d. This is neither since a lens cannot be made this way.