This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'In a patient of primary hypothyroidism, the hormonal profile will read - \nSelect and explain. \nA. Low T3, low T4, low TSH, B. Low T3, low T4 high TSH, C. High T3, high T4, high TSH, D. LowT3, low T4, normal TSH', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref - semantischolar.org', 'role': 'assistant'}]