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: Anatomy
Derivative of third pharyngeal pouch is: 
Select and explain. 
A. Thymus, B. Inferior parathyroid gland, C. Both of the above, D. None of the above
C: Both of the above
Answer: C: Both of the above 
Explanation: In the fifth week, epithelium of the dorsal region of the third pouch differentiates into the inferior parathyroid gland, while the ventral region forms the thymus. Ref: Langman's embryology 11th edition Chapter 16.