This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
Troponin-C mimics which of the following? 
Select and explain. 
A. Calmodulin, B. Calcineurin, C. Calretinin, D. Ceruloplasmin
A: Calmodulin
Answer: A: Calmodulin 
Explanation: Troponin C contains binding site for Ca2+ that initiates muscle contraction.(Ref: Textbook of physiology AK Jain 5th edition page no.164)