$\mathrm{SO}_{2}$ and $\mathrm{CO}$ adversely affect
(A) oxygen carrying capacity of blood and functioning of lungs respectively
(B) functioning of the respiratory system and brain respectively
(C) functioning of the respiratory system and oxygen carrying capacity of blood respectively
(D) functioning of air passages and chest respectively
$\mathrm{SO}_{2}$ and $\mathrm{CO}$ adversely affect
(A) oxygen carrying capacity of blood and functioning of lungs respectively
(B) functioning of the respiratory system and brain respectively
(C) functioning of the respiratory system and oxygen carrying capacity of blood respectively
(D) functioning of air passages and chest respectively
functioning of the respiratory system and oxygen carrying capacity of blood respectively