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
A patient with the complaint of sore throat, dysphagia, and ulcers over the palate since 1 week, comes to OPD. On examination, you found vesicles over the soft palate and tonsillar pillar. The ulcers have a gray base and inﬂamed periphery. What could be the possible diagnosis? 
Select and explain. 
A. Herpangina, B. Pharyngitis, C. Chickenpox, D. Primary herpetic gingivostomatitis
A: Herpangina
Answer: A: Herpangina 
Explanation: Differential Diagnosis

Tonsillitis / pharyngitis : No vesicles / ulcers, purulent exudate, culture.
Chickenpox : Skin lesions
Primary herpetic gingivostomatitis : Generalised acute marginal gingivitis, not epidemic, in anterior part of oral cavity.