Propionic acid with Br2-P yields a dibromo product. Its structure would be
CH2Br - CHBr -COOH
CH2-Br-CH2-COBr
CH2-Br-CH2-COBr
D.
CH2-Br-CH2-COBr
Br2 in presence of P attacks on the alpha carbon atom of acid and alpha hydrogen is substituted by bromine.
This reaction is called Hell -Volhard Zelinsky (HVZ) reduction.
