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: Medicine
All are TRUE about thyroid gland, EXCEPT: 
Select and explain. 
A. Development stas at 3rd week of gestation, B. It develops from the floor of the primitive pharynx, C. Ectopic location of the thyroid gland is at the base of the tongue, D. Thyroid hormone synthesis begins at 20th week of gestation
D: Thyroid hormone synthesis begins at 20th week of gestation
Answer: D: Thyroid hormone synthesis begins at 20th week of gestation 
Explanation: The thyroid develops from the floor of the primitive pharynx during the third week of gestation. Rare ectopic location of thyroid tissue is at the base of the tongue (lingual thyroid) The hormone synthesis normally begins at about 11 weeks' gestation. Ref: Harrison, E-18, P-2911