Question

Excessive exposure of humans to UV-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)

Answer 1

The correct option is C (i) and (iii)

Ozone layer present in stratosphere functions as a shield against harmful ultraviolet radiations. In the absence of ozone layer,
the extremely harmful UV radiations will reach earth, cause large scale mutations to organisms, reducing photosynthesis, blinding of animals and humans, developing skin cancer and herpes and death of young ones. By filtering out harmful UV radiations, ozone protects the immune system of living beings against various diseases.