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: Dental
[{'content': 'All may lead to hives and wheals except – \nSelect and explain. \nA. Cold, B. Hepatitis C, C. Serum sickness, D. Typhoid fever', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Urticaria is also referred to as hives.\nWheal is the characteristic lesion of urticaria.\nCold, serum sickness and Viral hepatitis (HBV, HCV) can cause urticaria.\nTyphoid does not cause urticaria.', 'role': 'assistant'}]