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: Surgery
Pendred's syndrome is: 
Select and explain. 
A. Thyroiditis extending into adjacent structures., B. Autoimmune thyroiditis., C. Deaf and goitrous patient since infancy., D. None.
C: Deaf and goitrous patient since infancy.
Answer: C: Deaf and goitrous patient since infancy. 
Explanation: None