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Two refracting media are separated by a spherical interface as shown in the figure. $PP’$ is the principal axis, $\mu_1$ and $\mu_2$ are the refractive indices of medium of incidence and medium of refraction respectively. Then :

• A
  if $\mu_2 > \mu_1$, then there cannot be a real image of real object.
• B
  if $\mu_2 > \mu_1$, then there cannot be a real image of virtual object.
• C
  if $ \mu_1 > \mu_2$, then there cannot be a virtual image of virtual object.
• ✓
  Both $(A)$ and $(C)$