question_answer

If \[P{{O}_{2}}\] of inspired air is \[104\text{ }mm\text{ }Hg\] then the \[P{{O}_{2}}\] of first \[150\text{ }ml\] of expired air during normal breathing would be about :-

A)  \[40\text{ }mm\text{ }Hg\]                

B)  \[46\text{ }mm\text{ }Hg\]

C)  \[104\text{ }mm\text{ }Hg\]  

D)  \[150\text{ }mm\text{ }Hg\]