Match List I (disease) with List II (cause):

List I

i.Osteoporosis

ii.Leukaemia

iii.Lung cancer

List II

a.Fluorine

b.Sr-90

c.Benzopyrene

Ai-a, ii-c, iii-b

Bi-c, ii-a, iii-b

Ci-a, ii-b, iii-c ✓ Correct

Di-c, ii-b, iii-a

Correct answer: (C) i-a, ii-b, iii-c

Explanation

Osteoporosis is linked here with fluorine, which affects bone health.

Leukaemia is associated with strontium-90, a radioactive bone-seeking isotope.

Lung cancer is tied to benzopyrene, a carcinogen in smoke and soot.

This is a three-way match with each disease bound to one causative agent.

The correct pairing links osteoporosis to fluorine, leukaemia to strontium-90 and lung cancer to benzopyrene.

Benzopyrene is found in tobacco smoke, vehicle exhaust and charred food.

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