Assertion: The diffusion membrane is made up of three major layers namely, the thin squamous epithelium of alveoli, the endothelium of alveolar capillaries and the basement membrane in between Reason: The total thickness of the diffusion membrane is much greater than a millimetre.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false.

Assertion: The diffusion membrane is made up of three major layers nam

1.	Assertion: The diffusion membrane is made up of three major layers namely, the thin squamous epithelium of alveoli, the endothelium of alveolar capillaries and the basement membrane in between Reason: The total thickness of the diffusion membrane is much greater than a millimetre.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false.
Answer» Correct Answer - D The diffusion membrane is made up of three major layers namely, the thin squamous epithelium of alveoli, the endothelium of alveolar capillaries and the basement substance in between.Â The total thickness of the diffusion membrane is much less than a millimeter.