Mutations are induced mostly by.

UV radiations

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Beta rays

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Alpha rays

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Gamma rays

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Solution

The correct option is D Gamma rays
Gamma radiations are ionising radiations and are physical mutagens. They are used as mutagens in such materials. where nucleus is deep seated, e.g. seeds, stem cuttings, etc. 'Sharbati Sonora' variety of wheat has been developed by gamma radiations on 'Sonora-64' variety (Mexican dwarf wheat variety).

So, the correct answer is 'Gamma rays'

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