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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Derivative of third pharyngeal pouch is:
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The correct answer is  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.