Benzene and formaldehyde are two among many volatile organic compounds that cause air pollution. Given below are a few negative effects of these volatile compounds on humans. Which of these is/are exclusively caused by the above mentioned compounds and not by other volatile compounds?

(ii) and (iii)

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(i), (ii) and (iv)

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Only iv

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(i) and (ii)

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Solution

The correct option is C Only iv
Volatile organic compounds causing air pollution are generally produced by paints, varnishes, adhesives, preservatives, solvents, etc. and fossil fuel burning. They cause respiratory illnesses, irritations of throat, eyes and nose, nausea and acute poisoning. VOCs like benzene and formaldehyde are carcinogenic.

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