Carboxylic acids having at least one `alpha`-hydrogen react with `Cl_(2)" or "Br_(2)` in the presnence of red phosphorus to give `alpha`-halo acids. The reaction is known as H.V.Z. reaction. The HVZ reaction is limited to the formation of `alpha`-chloro acid and `alpha`-bromo acid and it is sometimes difficult to carry out the reaction. Answer the following questions :
Which of the following carboxylic acids will not give HVZ reaction ?

Options

A. `CH_(3)COOH`
B. `CH_(3)-overset(CH_(3))overset(|)CH-COOH`
C. `CH_(3)-CH_(2)-COOH`
D. `CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-COOH`

Answer

D

Explanation

(d) The acid has no `alpha`-hydrogen atom.