This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pathology
Diagnostic Troponin I value for MyoCardial infarction is? 
Select and explain. 
A. >O.2ng\/mL, B. >O.4ng\/ml, C. >O.6 ng\/mL, D. >O.8ng\/mL
A: >O.2ng\/mL
Answer: A: >O.2ng\/mL 
Explanation: TnI and TnT normally are not found in the circulation however after acute MI, both are dectectable within 2-4 hr with levels peaking at 48hrs and remaining elevated for 7 to 10 days Robbins 9 th edition page no. 383