<prompt> Difference between contusion and post-mortem lividity is that post-mortem lividityShows 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 postmortem lividity is washable. 