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: Pharmacology
[{'content': 'A 15 year old boy was stung by a bee. He had difficulty in breathing and facial edema. What is the best treatment ? \nSelect and explain. \nA. IV Adrenaline, B. SC Adrenaline, C. IV Antihistamine, D. IV Hydrocortisone', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]