A thin prism of angle 15^@ made of glas...

A thin prism of angle `15^@` made of glass of refractive index = 1.5 is combined with another prism of glass of refractive index = 1.75 .The combination of prism produces dispersion without deviation.The angle of the second prism should be

A

`5.33^@`

B

`4^@`

C

`3^@`

D

`2.6^@`.

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