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': 'Features of pneumothorax are all except – \nSelect and explain. \nA. Devoid of lung markings, B. Hypertranslucency, C. Shift of mediastinum to same side, D. Collapse of ipsilateral lung', 'role': 'user'}, {'content': 'Answer: C \nExplanation: There is shift of mediastinum to opposite (contralateral) side (not same side).', 'role': 'assistant'}]