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Q. सबसे खराब वायु प्रदुषण उप्तन्न करने वाला पदार्थ है

(A) धुँआ
(B) सल्फर डाइऑक्साइड
(C) CO₂
(D) कार्बन मोनोऑक्साइड
Correct Answer - Option(C) Science

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