This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'Which malignancy would occur in long-standing multinodular goitre? \nSelect and explain. \nA. Papillary Carcinoma, B. Follicular Carcinoma, C. Anaplastic Carcinoma, D. Medullary Carcinoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The incidence of follicular carcinoma is high in endemic goitrous areas, with long-standing multinodular goitre, possibly owing to persistent TSH stimulation.Dominant or rapidly growing nodules, especially in longstanding goitres, should always be subjected to aspiration cytology.', 'role': 'assistant'}]