Question

Excessive exposure of humans to UV-rays results in

1. damage to immune system
2. damage to lungs
3. skin cancer
4. peptic ulcers

Options

• (i) and (ii)

• (ii) and (iv)

• (i) and (iii)

• (iii) and (iv)

Answer 1

(i) and (iii)

Explanation - 

UV-rays cause damage to DNA causing damage to immune system and skin cancer.