This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
Compared to follicular Ca, papillary Ca of thyroid associared with 
Select and explain. 
A. More male preponderance, B. Radiation exposure, C. Iodine deficiency, D. Increased moality
B: Radiation exposure
Answer: B: Radiation exposure 
Explanation: Papillary carcinoma thyroid is more seen in radiation exposure, and also has high lymph node involvement. Follicular thyroid carcinoma is associated with iodine deficiency. It has hematogenous spread and comparitively a less otable outcome Both are common in females.