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
In a patient of primary hypothyroidism, the hormonal profile will read - 
Select and explain. 
A. 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
B: Low T3, low T4 high TSH
Answer: B: Low T3, low T4 high TSH 
Explanation: Ref - semantischolar.org