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  1. Which of the following professional are more likely to run the risk of a permanent change in their cell's DNA ?
    1. Rescarchers using carbon 14 isotope
    2. X - ray technicia
    3. Cola miner
    4. Dyer and painter
    Code
    1. 2 alone
    2. 1, 2 and 3
    3. 1, 2 and 4
    4. 1, 3 and 4
Correct Option: C

NA



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