Answer: A, B, D
The two C=C bonds are cleaved. CHX3CH= gives ethanoic acid, the central =CH−CHX2CHX2−CH= unit gives HOOC−CHX2CHX2−COOH, and =C(CHX3)X2 gives propanone. No carbon is lost as COX2, so statements 1, 2 and 4 are correct (three products).