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': 'Inherited coagulation disorder - \nSelect and explain. \nA. Protein C deficiency, B. Protein S deficiency, C. Leiden factor, D. All', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'a' i.e., Protein - C deficiency; 'b' i.e., Protein - S deficiency; 'c' i.e., Leiden factor", 'role': 'assistant'}]