Question

Which one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?

A) the lungs can be made fully empty by forcefully breathing out all air from them.

B) One can breathe out air through Eustachian tube by closing both nose and mouth.

C) One can consciously breathe in and breathe out by moving the diaphragm alone, without moving the ribs at all.

D )One can breathe out air totally without oxygen.

Answer 1

Option C.