This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: DNB 2018, Subject name: Medicine
What is the t1/2 of T4? 
Select and explain. 
A. 3-4 days, B. 5-6 days, C. 6-7 days, D. 7-8 days
C: 6-7 days
Answer: C: 6-7 days 
Explanation: T4 t 1/2 =5-7 days T3 t 1/2 = 1 day