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Properties of CO2

The harmful e...

Question

The harmful effects of cigarette smoke are caused by _______.

A

nitrogen dioxide

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B

acid solution

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C

tars and volatile condensates

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D

A and C above combined

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Solution

The correct option is D tars and volatile condensates
It is clearly mentioned in the second paragraph of the passage that - 'Deposits of tars and volatile condensates in cigarette smoke can then accumulate on the unprotected bronchial surfaces, directly attacking the naked cells.'
Therefore, Option C is the right answer.
Option A is incorrect because Nitrogen Dioxide is a gas produced while smoking.
There is no evidence in the passage to suggest that Option B is the right answer.
Therefore, it is incorrect.
Option D is incorrect because the right answer is Option C.

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