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': 'FNAC is not useful in which of the following thyroid carcinoma: March 2012 \nSelect and explain. \nA. Medullary carcinoma, B. Follicular carcinoma, C. Papillary carcinoma, D. Lymphoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: B i.e. Follicular carcinoma Thyroid carcinoma Thyroid conditions that may be diagnosed by FNAC include colloid nodules, thyroiditis, papillary carcinoma, medullary carcinoma, anaplastic carcinoma & lymphoma FNAC cannot distinguish between a benign follicular adenoma & follicular carcinoma, as this distinction is dependent not on cytology but on histological criteria, which include capsular & vascular invasion', 'role': 'assistant'}]