This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid and Parathyroid, Subject name: Pathology
[{'content': 'Radiation is most commonly associated with the following thyroid cancer? \nSelect and explain. \nA. Papillary, B. Follicular, C. Medullary, D. Anaplastic', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Papillary o Radiation induced thyroid carcinoma is papillary carcinoma.o Orphan Annie eye nuclei is characteristic of: Papillary thyroid carcinomao Most common thyroid carcinoma: Papillary carcinomao Post radiation thyroid carcinoma: Papillary carcinomao Thyroid carcinoma arising in thyroglossal cyst: Papillary carcinomao Hurthle cell carcinoma is a variant of: Follicular carcinoma.o Hurthle cells are seen in: Folliculr carcinoma, follicular adenoma, Hashmoto thyroiditiso Follicular carcinoma is differentiated from follicular adenoma by: Capsular invasion or vascular invasiono FNAC is not diagnostic in thyroid carcinoma of: Follicular typeo Medullary thyroid carcinoma secretes: Calcitonin.o Thyroid carcinoma associated with amyloid deposition (amyloid stroma): Medullary thyroid carcinomao Gene involved in medullary thyroid carcinoma: RET protooncogene.", 'role': 'assistant'}]