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: Anatomy
[{'content': 'What is the approximate weight of thymus gland at pubey? \nSelect and explain. \nA. 15 gms, B. 35 gms, C. 25 gms, D. 55gms', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The thymus is largest and more active during the neonatal and pre-adolescent periods. By the early teens, the thymus begins to atrophy and thymic stroma is replaced by adipose tissue. Neveheless, residual T lymphopoiesis continues throughout adult life. The thyroid reaches maximum weight ( 20-37 grams) by the time of pubey. Age Mass Bih about 15 gms Pubey About 35 gms Twenty- five years 25 gms Sixty years < 15 gms Seventy years as low as 5 gms', 'role': 'assistant'}]