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': 'Ipsilateral Homogeneous opacification and contralateral mediastinal shift is seen in \nSelect and explain. \nA. Collapse, B. Consolidation, C. Hydrothorax, D. Hemothorax', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]