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': 'A 41-year-old man presented to the emergency department with a 9-month history of cough, exertional dyspnea, nocturnal diaphoresis, and weight loss of 10 kg. The physical examination revealed painless, massive, discrete, rubbery cervical, supraclavicular and axillary lymphadenopathy. Plain radiography of the chest showed bilateral hilar lymphadenopathy. The serum calcium level was elevated at 16.2 mg per deciliter; serum parathyroid hormone is within normal range.\n\nUrgent treatment to be instituted for him would be \nSelect and explain. \nA. Intravenous administration of normal saline and a bisphosphonate, B. Oxygen 6l/m by mask, C. Antibiotics and anti-inflammatory drugs, D. Anti tussive and chest physiotherapy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]