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Pick the wrong answer in the context with rainbow.

(1) Rainbow is combined effect of dispersion, refraction and reflection of sunlight.

(2) When the light rays undergo two internal reflections in a water drop, a secondary rainbow is formed. 

(3) The order of colours is reversed in the secondary rainbow.

(4) An observer can see a rainbow when his front is towards the sun.

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Correct option is (4) An observer can see a rainbow when his front is towards the sun.

To see the rainbow the sun should be on his backside.

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