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
Aberrant thyroid tissue may be found in all except: 
Select and explain. 
A. Lingual thyroid, B. Thyroglossal ectopic thyroid, C. Struma ovarii, D. None
D: None
Answer: D: None 
Explanation: Usually there are 3 places where aberrant thyroid tissues may be formed:
i) Lingual thyroid.
ii) Thyroglossal ectopic thyroid.
iii) Struma Ovarii
Struma Ovarii is an ovarian teratoma in which thyroid tissue may be present. It is malignant.