This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'A well differentiated thyroid follicular carcinoma is best differentiated from a follicular adenoma by: \nSelect and explain. \nA. Presence of Huhle cell, B. Vascular invasion, C. Nuclear features, D. Lining of tall columnar and cuboidal cells', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Follicular adenoma can be differentiated from follicular carcinoma on the basis of invasion of capsule or pericapsular blood vessel. Follicular adenoma do not invade capsule or peri capsular blood vessel. Ref: Bailey and Love Sho Practice of Surgery 24th Edition, Page 797, 799; Schwaz 8th Edition, Page 420; Robbins 7th Edition, Page 1180, 1181', 'role': 'assistant'}]