Which of the following has most acidic proton :

Options

A. `CH_(3)COCH_(3)`
B. `(CH_(3))_(2)C=CH_(3)`
C. `CH_(3)COCH_(2)COCH_(3)`
D. `(CH_(3)CH)_(3)CH`.

Answer

C

Explanation

`CH_(3)-overset(O)overset(||)C-CH_(2)-overset(O)overset(||)C-OC_(2)H_(5)"(Aceto ester)"`
contains two electron withdrawing groups around `CH_(2)` and this `CH_(2)` group is called active methylene group and its hydrogens are acidic.