A molecule of organic compound contains atoms of Carbon Hydrogen Nitrogen and oxygen in the ratio 9:15:1:3 .If there are 18 oxygen atoms per molecule then the molecular formula of the organic compound is
(A) `C_9H_15N_6O_18`
(B) `C_(27)H_(45)N_(3)O_(18)`
(C) `C_(54)H_(90)N_(6)O_(18)`
(D) `C_(54)H_(15)N_(6)O_(18)`