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
Grave&;s disease is the most common cause of- 
Select and explain. 
A. Hypothyroidism, B. Hypehyroidism, C. Thyroiditis, D. None of the above
B: Hypehyroidism
Answer: B: Hypehyroidism 
Explanation: ref: Ganong&;s review of medical physiology; 24th edition; page no; 347 Grave&;s disease an autoimmune disorder which leads to an overactive and enlarged thyroid gland and hypehyroidism.