C4H10O2
C3H10O2
C3H6O3
C2H2O4
Correct answer is C
(CH2O)n = 90; (12 + (1 x 2) + 16)n = 90
(12 + 2 + 16)n = 90; 30n = 90; n = 9030; n = 3
(CH2O)3 = Molecular formula ; = C3H6O3
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