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  • Excessive exposure of humans to U V-rays results in (i) damage to immune system (ii) damage to lungs (iii) skin cancer (iv) peptic ulcers (a) (i) and (ii) (b) (ii) and (iv) (c) (i) and (iii) (d) (iii) and (iv)

Excessive exposure of humans to U V-rays results in
(i) damage to the immune system
(ii) damage to lungs
(iii) skin cancer
(iv) peptic ulcers

(a) (i) and (ii)                 (b) (ii) and (iv)

(c) (i) and (iii)                 (d) (iii) and (iv)

Answers (1)

(c) The UV-rays have extremely harmful effects on human beings, plants as well as animals. It can cause:
1. Skin cancer
2. Cataract: Damaging the eyes
3. Damages the immune system by lowering the body's resistance to diseases.
4. Premature ageing and other skin damage.

Therefore option (C) is correct

Posted by

infoexpert27

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