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

Options

A. Cigaretts smoking may lead to insflammation of bronchi
B. Neural signals from pneumotaxic centre is pons region of brain can increase the duration of inspiration
C. Workers in grinding and stone - breaking industries may suffer, from lungs fibrosis
D. About 90 % of carbon dioxide `(CO_(2))` is carried by haemoglobin as carbaminohaemoglobin

Answer

C