Doubt from Refraction

I have no clue here

Color of light is basically a characteristic of its frequency
As frequency will remain the same color of light will not change @Gaurav_2020_3

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Same thoughts as you but answer is c

Oops sorry that's right color will be black because as you increase incident angle there will be total internal reflection for all colors(VIBGYOR respectively ) so no white light will come out (i.e. black) @Gaurav_2020_3

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