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: Skin
[{'content': 'A 9 year-old has multiple itchy erythematous wheals all over the body for 2 days. There is no respiratory difficulty. Which is the best treatment? \nSelect and explain. \nA. Antihelminthics, B. Systemic coicosteroids, C. Antihistamines, D. Adrenaline', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Antihistamines', 'role': 'assistant'}]