Q11Multiple choice
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) OUR ENVIRONMENT 107
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(c) (i) and (iii)