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# An organic compound has an empirical formula $CH_2O$. Its vapour density is 45. The molecular formula of compound is :

$\begin {array} {1 1} (a)\;CH_2O & \quad (b)\;C_2H_5O \\ (c)\;C_2H_4O_2 & \quad (d)\;C_3H_6O_3 \end {array}$

$(d)\;C_3H_6O_3$