Medicine The Lab investigation of a patient shows lower limit of normal T4, & increased TSH. Which of the following is the most likely diagnosis- A Grave's disease B Hashimoto's disease C Pituitary failure D Hypothalamic failure 💡 Explanation The Lab investigation of a patient shows lower limit of normal T4, & increased TSH. Which of the following is the most likely diagnosis- ✓ Correct Answer: B. Hashimoto's disease