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Question
Excessive exposure of humans to UV-rays results in
- damage to immune system
- damage to lungs
- skin cancer
- peptic ulcers
Options
(i) and (ii)
(ii) and (iv)
(i) and (iii)
(iii) and (iv)
Solution
(i) and (iii)
Explanation -
UV-rays cause damage to DNA causing damage to immune system and skin cancer.
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