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The components of air which are harmful to living beings are (a) nitrogen and carbon dioxide.

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asked Jan 31, 2018 in Science by Rohit Singh (61,782 points) ● 35 ● 133 ● 356
The components of air which are harmful to living beings are
(a) nitrogen and carbon dioxide.
(b) dust and water vapour.
(c) dust and smoke.
(d) smoke and water vapour.

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answered Jan 31, 2018 by sameer (82,980 points) ● 5 ● 11 ● 37
selected Feb 2, 2018 by sarthaks
 
Best answer

(c) dust and smoke.

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