Asseration : Bacteria and other particles pass down the wind pipe and enter the lunds, causing damage to the tissue.
Reason : Smoking reduces ciliary effectiveness.

Options

A. If both asseration and reason are true and the reason in the correct explanation of the asseration.
B. If both asseration and reason are true but reason is not the correct explanation of the asseration.
C. If asseration is true but reason is false
D. If the asseration and reason both are false

Answer

A

Explanation

Cillia in the respiratory tract of humans sweep invading bacteria and particles up the trachea and away from the lungs. If cilliary effectiveness is reduced beacuse of smoking. Invalding organisms pr particles could pass down the windpipe and enter the lungs. causing damage to the delicate lung tissue that might result in disease.