A denser medium of refractive index 1.5 has a concave surface of radius of curvature 12 cm. An object is situated in the denser medium at a distance of 9 cm from the pole. Locate the image due to refraction in air.
A. A real image at 8 cm
B. A virtual image at 8 cm
C. A real image at 4.8 cm
D. A virtual image at 4.8 cm