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: Pathology
Prodrornal symptoms precede 1 to 2 days before the onset of disease in 
Select and explain. 
A. viral fever, B. erythema multiforme, C. pemphigus, D. pemphigoid
A: viral fever
Answer: A: viral fever 
Explanation: None