Consider a concave mirror and convex lens (refractive index = 1.5 ) of focal length 10 cm each , separated by a distance of 50 c in air (refractive index = 1 ) , as shown in the figure . An object is placed at a distance of 15 cm from the mirror. Its erect image , formed by this combination , has magnification `M_1` . When the set - up is kept in a medium of refractive index `7/6` , the magnification becomes `M_2` . The magnitude `|(M_2)/(M_1)|` is

Answer

b

Explanation

N//a