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': 'True about boundaries of lesser Sac - \nSelect and explain. \nA. Posteriorly stomach, B. Crus of diaphragm, C. Spleen, D. Greater omentum', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Greater omentum forms both anterior and posterior wall of lesser sac.\nThe stomach is anterior to lesser sac.\nSpleen and crus of diaphragm do not form boundaries of lesser sac.', 'role': 'assistant'}]