A Double-Concave Lens Has Equal Radii of Curvature of Magnitudes

Multiple Choice

A double-concave lens has equal radii of curvature of magnitudes 15.1 cm. An object placed 14.2 cm from the lens forms a virtual image 5.00 cm from the lens. What is the index of refraction
Of the lens material?

A) 1.98
B) 1.84
C) 2.06
D) 1.90