Solve que 6:

6. ​A concave spherical surface of radius of curvature 10 cm separates  two medium x & y of refractive index 4/3 & 3/2 respectively. If the is placed along principal axis in medium X then 

(A) image is always real 
(B) image is real if the Object distance is greater than 90 cm 
(C) image is always virtual 
(D) image is virtual if the object distance is less man 90 cm


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