<prompt> The predominant cell after 72 hours of myocardial infarction-NeutrophileLymphocytesMacrophagesMast cells  <response>: Acute inflammatory reaction with a predominance of Neutrophils is seen upto 2-3 days.After 3 days Le. after 72 hours Macrophages become the predominant cell type and become involved in the removal of necrotic debris.In myocardial infarction.Neutrophils appear at 12-24 hrs.Granulation tissue appear at 6-10 daysThe beginning of fibrosis and 7-14 daysorganization of granulation tissueDevelopment of fibrous scar hearing 2-6 weeks 