This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
Thyroid hormones belong to which class of hormone? 
Select and explain. 
A. Steroids, B. Proteins, C. Polypeptides, D. Amino acid derivatives
D: Amino acid derivatives
Answer: D: Amino acid derivatives 
Explanation: Thyroid hormones are synthesized from the amino acid "TYROSINE" by iodination. Ref: guyton and hall textbook of medical physiology 12 edition page number:564,565,566