"In a laboratory experiment, an unknown organic compound 'M' with a molecular formula C7H8O is subjected to various chemical tests. Initially, 'M' forms a blue-green precipitate when reacted with Schiff's reagent, indicating the presence of an aldehyde group. However, 'M' does not react with 2,4-Dinitrophenylhydrazine (2,4-DNP), a test typically positive for carbonyl compounds. Furthermore, when 'M' is treated with sodium hydroxide (NaOH) and iodine (I2), a yellow precipitate is formed, suggesting the presence of a methyl ketone. Additionally, 'M' undergoes catalytic hydrogenation to consume two moles of hydrogen, forming a compound with the formula C7H12O. Based on these observations, what is the most probable structure of compound 'M'?" A. Benzaldehyde B. Acetophenone C. p-Methoxybenzaldehyde D. Mesityl oxide