A candle placed 25 cm from a lens, forms an image on a screen placed 75 cm on the other end of the lens. The focal length and type of the lens should be

Options

A. + 18.75 cm and convex lens
B. - 18.75 cm and convev lens
C. + 20.25 cm and convex lens
D. - 20.25 cm and convev lens

Answer

A