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A parallel beam of light passes parallel...

A parallel beam of light passes parallel to the principal axis and falls on one face of a thin convex lens offocal length f and after two internal reflections from the second face forms a real image. The distance of image from lens if the reflactive index of material of lens is `1.5` :

A

`f//7`

B

`f//2`

C

7f

D

None of these

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