This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pediatrics, environment and nutrition, Subject name: Pathology
[{'content': 'In an infant, bone marrow biopsy is done from \nSelect and explain. \nA. Tibia, B. Sternum, C. Posterior superior iliac spine, D. iliac crest', 'role': 'user'}, {'content': 'Answer: A \nExplanation: . The tibia is the site for bone marrow biopsy in the newborn infant and in children under 2 years of age. Ref Robbins 9/e pg 261-262', 'role': 'assistant'}]