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
[{'content': 'A 28 year old female presents with recurrent aboions and pain the calves. She is most likely suffering from a deficiency of which of the following - \nSelect and explain. \nA. Protein C, B. Thrombin, C. Factor XIII, D. Plasmin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: . Protein C', 'role': 'assistant'}]