<prompt> A 20 yr old male was found dead in his home. Family claimed it as dead due to sudden MI What is the best test to distinguish antemortem from post-mortem clot?Lines of ZahnChicken fatRed cellsWhite cells  <response>: Ans. a Lines of ZahnLine of Zahn are due to alternate pale layers of platelets with fibrin darker layers marked with arrowwith more RBCs.These lines distinguish antemortem clots from the bland non-laminated clots postmortem Q clots 