This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid Gland, Subject name: Surgery
False about medullary cancer thyroid 
Select and explain. 
A. Secrete Calcitonin, B. 20-25% are familial, C. Diarrhea are seen in 30%, D. These cancers take up Radioactive Iodine
D: These cancers take up Radioactive Iodine
Answer: D: These cancers take up Radioactive Iodine 
Explanation: Ans. (d) These cancers take up Radio iodineRef: Bailey and Love 27th Edition Page 820* Medullary thyroid cancers are not hormone dependent (Not TSH dependent)* They don't take up RAI* Differentiated thyroid Cancers - Papillary and follicular take up Radio active iodine and used in cases of treatment of high risk cases.