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
Treatment of medullary Ca thyroid is: 
Select and explain. 
A. Total thyroidectomy only, B. Total thyroidectomy + Radical neck dissection, C. Total thyroidectomy + Radio Iodine Therapy, D. Total thyroidectomy + prophylactic CND
D: Total thyroidectomy + prophylactic CND
Answer: D: Total thyroidectomy + prophylactic CND 
Explanation: Ans. (d) Total thyroidectomy + Prophylactic Central Neck Node dissection (CND)Ref: Schwartz 10th Edition Page 1549* Routine Central neck node dissection must be done for Medullary cancers of Thyroid.