Biochemistry Serum marker to return to normal level, last in myocardial infarction is: A Lactate dehydrogenase B Creatine phosphokinase C Aspaate transmainase D Myoglobin 💡 Explanation Serum marker to return to normal level, last in myocardial infarction is: ✓ Correct Answer: A. Lactate dehydrogenase