This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: viral infection, Subject name: Medicine
[{'content': 'Volcano ulcers in esophagus are seen in: \nSelect and explain. \nA. Herpetic esophagitis, B. Candida esophagitis, C. Apthous ulcer in Crohn, D. HIV esophagitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Volcano ulcers - Herpetic esophagitis - odynophagia Candida esophagitis Whitish plague adheres to wall of esophagus', 'role': 'assistant'}]