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
[{'content': 'A lady presents with complaints of hemoptysis.Her chest X-ray appears to be normal. What is the next best investigation - \nSelect and explain. \nA. Bronchoscopy, B. High resolution CT, C. Sputum cytology, D. Pulmonary function test', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]