What is the ratio of the gases in medical air? – McqOptions

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1.	What is the ratio of the gases in medical air?
A.	78% Nitrogen, 21 % oxygen
B.	75 % Oxygen, 25 % Carbon dioxide
C.	60% Nitrogen, 20% Oxygen, 20% Carbon Di oxide
D.	50% Nitrogen, 50% Oxygen
Answer» B. 75 % Oxygen, 25 % Carbon dioxide

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