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0. System is shown in the figure. Light rays from a paint object are first deviated by a prism and then focused by a thin lens of focal length f. The prism is made of material with refractive index and has small apex angle 20 i.e., small angle approximations are valid sinα ≡ α and sin (α + β) = α + β, where α and β are angles. The final image is (NTSE Andhra Pradesh, Stage-I, 2016-17)
Virtual and formed at a distance 2f from the lens
Real and formed at a distance 2f from the lens
Real and formed at a distance f
Real and formed at a distance 3f from the lens
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and has small apex angle 20 i.e., small angle approximations are valid sinα ≡ α and sin (α + β) = α + β, where α and β are angles. The final image is 
