<prompt> In myocardial infarction the infarct acquires hyperemic rim with an yellow centre at3-7 days10-20 days7-14 days1-2 hours  <response>: 3 7 days FindingsGross examination at borderSoftening yellow-tan center Histopathologylight microscopyBeginning of disintegration of dead muscle fibersNecrosis of neutrophilsBeginning of macrophageremoval of dead cells at border 