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
A patient with history of frequent abortions and pain in calf muscles from past 4 years is due to deficiency of 
Select and explain. 
A. Factory VII, B. Protein c, C. Plasmin, D. Thrombin
B: Protein c
Answer: B: Protein c 
Explanation: None