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: Medicine
A 30 year old patient presents with odynophagia, there no h/o drug intake. On endoscopy there are multiple ulcers in the esophagus diagnosis is 
Select and explain. 
A. Cytomegalo virus infection, B. Herpes simplex virus infection, C. Candidiasis, D. Achalasia.
B: Herpes simplex virus infection
Answer: B: Herpes simplex virus infection 
Explanation: None