<prompt> Serum marker to return to normal level, last in myocardial infarction is:Lactate dehydrogenaseCreatine phosphokinaseAspaate transmainaseMyoglobin  <response>: Enzymes in MILDH is the last enzyme to rise 3-4 days and also the last enzyme to return to normal level in MI 10-15 daysCPK returns to normal by 2-3 daysAST SCOT returns to normal by 4-5 daysMyoglobin returns to normal by 20-25 hours 