Correct Answer: Option C

Explanation

(CH₂O)n = 90; (12 + (1 x 2) + 16)n = 90
(12 + 2 + 16)n = 90; 30n = 90; n = \(\frac{90}{30}\); n = 3
(CH₂O)₃ = Molecular formula ; = C₃H₆O₃

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