Home Biology Breathing and Exchange of Gases Previous Year Questions Which one of the following is the correct st…
Biology Breathing and Exchange of Gases Previous Year Questions Single Correct MCQ
Published on: August 13, 2026

Which one of the following is the correct statement for respiration in humans?

A
Cigarette smoking may lead to inflammation of bronchi.
B
Neural signals form pneumotoxic centre in pons region of brain can increase the duration of inspiration.
C
Workers in grinding and stone-breaking industries may suffer from lung fibrosis.
D
About 90 per cent of carbon dioxide CO 2 is carried out by haemoglobin as carbamino haemoglobin.

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