An organic liquid `A` containing `C,H` and `O` has a pleasant odour with a boiling point of `78^(@)C`. On boiling. A with conc. `H_(2)SO_(4)` a colourless gas is produced which decolourises bromine water and alkaline `KMnO_(4)`. One mole of this gas also takes one mole of `H_(2)`. The organic liquid `A` is
A. `C_(2)H_(5)Cl`
B. `C_(2)H_(5)CHO`
C. `C_(2)H_(6)`
D. `C_(2)H_(5)OH`