Oxygen from the atmosphere reaches the mammalian blood stream through one of the path indicated below. Indicate the correct path, a = mouth, b = trachea, c = bronchiole, d = nostril, e = bronchus, f = alveoli
-
A.
a → b → e → f → d -
B.
b → d → f → e → c -
C.
d → b → e → c → f -
D.
b → a → f → e → c -
E.
f → e → c → d → c