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: Radiology
[{'content': 'A 40 years old man presents with a recurrent hemoptysis and purulent cough. X-ray was found to be normal. The next investigation done to aid in diagnosis is – \nSelect and explain. \nA. MRI, B. Bronchoscopy, C. HRCT, D. CT guided biopsy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: If chest X-ray is normal in a patient with recurrent hemoptysis, next investigation of choice is Bronchoscopy.', 'role': 'assistant'}]