Which biochemical investigation out of the following would be of no help in the confirmation of diagnosis?

Q. A 54-year –old male was rushed to the emergency when he collapsed in the middle of a business meeting. Examination revealed excessive sweating and high blood pressure.ECG chest was conclusive of Acute Myocardial infarction. Which biochemical investigation out of the following would be of no help in the confirmation of diagnosis?

A.            Cardiac Troponins

B.            Serum myoglobin

C.            Lactate dehydrogenase

D.            Creatine Phospho kinase-MB(CPK-MB)

Answer: Lactate dehydrogenase