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: Pathology
Creatinine kinase is elevated in MI after - 
Select and explain. 
A. 2 - 4 hrs., B. 4 - 8 hrs., C. 12 - 24 hrs, D. > 24 hrs.
A: 2 - 4 hrs.
Answer: A: 2 - 4 hrs. 
Explanation: Ans. is 'a' i.e., 2 - 4 hrs Enzyme Initiation of rise Peak Return to baseline CK-MB 2-4 hours 24 hours 48-72 hours Troponin T and I (TnT Tnl) 2-4 hours 48 hours 7-10 days AST/SGOT In 12 hours 48 hours 4-5 days LDH 24 hours 3-6 days 2 weeks