<prompt> Difference between contusion and post-moem lividity is that post-moem lividity-Shows sequential color changeEasily washableShows diffuse irregular marginsHas raised enzyme levels  <response>: The synopsis of forensic medicine toxicology;Dr k.s narayan reddy; 28th edition;pg.no. 88; Contusion or bruises are not washable but postmoem lividity is washable. Also refer page no.106 