This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Tonsil is formed from 
Select and explain. 
A. Ist Pharyngeal pouch, B. IInd Pharyngeal pouch, C. IIIrd Pharyngeal pouch, D. IV Pharyngeal pouch
B: IInd Pharyngeal pouch
Answer: B: IInd Pharyngeal pouch 
Explanation: Second Pouch(a) The epithelium of the ventral pa of this pouch contributes to the formation of the tonsil.(b) The dorsal pa takes pa in the formation of the tubotympanic recess.Reference: Inderbir Singh Embryology; 10th edition; Page no: 135