This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pneumothorax, Subject name: Medicine
[{'content': 'Which of the following is used for management of pneumomediastinum? \nSelect and explain. \nA. Breathing of high concentration of oxygen will lead to absorption of mediastinal air, B. Breathing of low concentration of oxygen will lead to absorption of mediastinal air, C. ICD tube in 2nd ICS, D. ICD tube in 5th ICS', 'role': 'user'}, {'content': 'Answer: A \nExplanation: For the patients with Pneumomediastinum we have to give high conc.of O2 helps in improving O2 saturation leads to absorption of mediastinal air. If mediastinal structures are compressed, the compression can be relieved with needle aspiration.', 'role': 'assistant'}]