This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiration, Subject name: Pathology
[{'content': 'Bronchoalveolar carcinoma presents as:(1991) \nSelect and explain. \nA. Hemoptysis, B. Collapse, C. Effusion, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans: d', 'role': 'assistant'}]