This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid, Subject name: Physiology
[{'content': 'Percentage of T4 and T3 released from thyroid gland- \nSelect and explain. \nA. 50% T4; 50% T3, B. 25% T4; 75% T3, C. 80% T4; 20% T3, D. 1000% T4; 0% T3', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is \'c\' i.e., 80% T4; 20% T3 " Approximately 80% of secreted hormone is T4 and 20% is T3".', 'role': 'assistant'}]