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

A)  Workers in grinding and stone-breaking industries may suffer, from lung fibrosis

B)  About 90% of carbon dioxide \[(C{{O}_{2}})\] is carried by haemoglobin as carbamino- haemoglobin

C)  Cigarette smoking may lead to inflammation of bronchi

D)  Neural signals from pneumotoxic centre in pons region of brain can increase the duration of inspiration