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: Anatomy
In case of Adenomatoid goitre which carcinoma is commonest to occur 
Select and explain. 
A. Medullary Ca, B. Follicular Ca, C. Papillary Ca, D. Anaplastic Ca
B: Follicular Ca
Answer: B: Follicular Ca 
Explanation: "An increased incidence of cancer (usually follicular) has been repoed from endemic areas. Dominant or rapidly growing nodules in longstanding goitres should always be subjected to aspiration cytology." Ref : Bailey & Love 25/e p778