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: Pathology
[{'content': 'FNAC is least diagnostic in which thyroid carcinoma- \nSelect and explain. \nA. Anaplastic, B. Papillary, C. Follicular, D. Thyroiditis', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Follicular Ca o FNAC is the best investigation for the diagnosis of all thyroid carcinomas except follicular carcinoma. o It cannot differentiate b/w follicular carcinoma and follicular adenoma. The definitive diagnosis of carcinoma is made when capsular and vascular invasion by the carcinoma is revealed.", 'role': 'assistant'}]