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Solution


Q.

Excessive exposure of humans to UV rays results in:

(i) damage to immune system
(ii) damage to lungs
(iii) skin cancer
(iv) peptic ulcers
1 (i), (ii)  
2 (ii), (iv)  
3 (i), (iii)  
4 (iii), (iv)  

Ans.

(3)

UV rays are extremely hazardous to humans, animals, and even plants. It can cause skin cancer, cataracts in the eyes, and immune system damage by reducing the body’s response to infections.