This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous Questions, Subject name: Medicine
[{'content': 'A patient presented with hemoptysis and persistent cough. The chest X-ray of the patient was normal. The next best investigation is? \nSelect and explain. \nA. Helical CT, B. High resolution CT, C. Bronchoscopy, D. Angiography', 'role': 'user'}, {'content': 'Answer: B \nExplanation: * For most patients, the first step in evaluation of hemoptysis should be a standard chest radiograph. * If lesion is not seen then a high resolution CT chest should be done for visualization of lesion . * If all of these studies are unrevealing, bronchoscopy should be done .', 'role': 'assistant'}]