This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Myocardial isoenzyme of CK which is specific for myocardial infarction is - 
Select and explain. 
A. CK-BB, B. CK-MB, C. CK-MM, D. All of the above
B: CK-MB
Answer: B: CK-MB 
Explanation: None