CH3COCH2ClOH−,Cl2−−−−−→ Product P is
ClCH2COCH2Cl
CH3COCHCl2
Both a and b
ClCH2COOH+CH3Cl
The reaction is a part of haloform reaction. However, -I effect of -Cl makes the H's of CH2Cl− more acidic, hence I is more likely to be formed.