This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
In stable angina 
Select and explain. 
A. CK- MB is elevated, B. Troponin 1 is elevated, C. Myoglobin is elevated, D. The level of cardiac markers remain un changed
D: The level of cardiac markers remain un changed
Answer: D: The level of cardiac markers remain un changed 
Explanation: Ref Harrison 19 th ed pg 1593 Necrotic myocardial fibres release a variety of enzymes into blood stream. In stable angina necrosis of the cell does not occur so there is no elevation of serum enzymes.