1. 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)
(iii) and (iv)

Question

1.	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)
(iii) and (iv)

Accepted Answer

Soln:

Answer is (c) (i) and (iii)
Explanation:
UV rays affect upper surface our body. UV rays lead to skin cancer and effect on skin will affect our immune system as skin is considered as primary level of immune barrier.

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