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: Medicine
The Lab investigation of a patient shows.↓T4, & ↑TSH. Which of the following is the most likely diagnosis - 
Select and explain. 
A. Grave's disease, B. Hashimoto's disease, C. Pituitary failure, D. Hypothalamic failure
B: Hashimoto's disease
Answer: B: Hashimoto's disease 
Explanation: None