An organic compound 'A' with molecular formula C₇H₆O forms 2,4-DNP derivative and reduces Tollens' reagent. When 'A' is heated with conc. NaOH, it gives sodium benzoate and compound 'B'. The compound 'B' is

A. Benzyl alcohol
B. Toluene
C. Acetophenone
D. Benzaldehyde