Which of the following substances is/are present in a higher percentag – McqOptions

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1.	Which of the following substances is/are present in a higher percentage in exhaled air than in inhaled air? (i) Carbon dioxide (ii) Oxygen (iii) Water vapour (iv) Nitrogen
A.	(i) only
B.	(i) and (iii) only
C.	(ii) and (iv) only
D.	(i), (ii), (iii) and (iv)
Answer» C. (ii) and (iv) only

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