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
Which of the following thyroid malignancy has the best outcome - 
Select and explain. 
A. Papillary, B. Medullary, C. Anaplastic, D. Mixed
A: Papillary
Answer: A: Papillary 
Explanation: Ans. is 'a' i.e., Papillary "In general pts. with PTC have an excellent prognosis with a greater than 95% 10-year survival rate." - Schwartz* Papillary carcinoma of thyroid is a slow growing tumor, usually not associated with blood borne metastasis, and hence has a better prognosis than the other varieties.* Follicular, Medullary and Anaplastic carcinomas are all associated with a greater incidence of blood borne metastasis and a poorer prognosis.