This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bleeding Disorders, Subject name: Pathology
[{'content': 'Hypercoagulability due to defective factor V gene is called- \nSelect and explain. \nA. Lisbon mutation, B. Leiden mutation, C. Antiphospholipid syndrome, D. Inducible thrombocytopenia syndrome', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Leiden mutation", 'role': 'assistant'}]