This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen & Pelvis, Subject name: Anatomy
[{'content': 'Average weight of spleen in adult: \nSelect and explain. \nA. 5 ounce, B. 7 ounce, C. 14 ounce, D. 21 ounce', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B 7 ounceRef: BDC, 6th ed. vol. II pg. 294* On an average the spleen is 1 inch or 2.5 cm thick, 3 inches or 7.5 cm broad, 5 inches or 12.5 cm long and 7 ounces in weight.Some Must Know Weights* Weight of liver: 1.5 kg.* Weight of thyroid gland: 25 gm* Weight of prostate: 8 gm.', 'role': 'assistant'}]