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: Dental
[{'content': 'Blood supply of ameloblast for most of its life cycle comes from \nSelect and explain. \nA. Dental papilla, B. Reduced enamel organ, C. Dental Sac, D. Dental Pulp', 'role': 'user'}, {'content': 'Answer: C \nExplanation: As long as the inner enamel epithelium is in contact with the dental papilla, it receives its nutrient supply from the blood vessels of dental papilla. When dentin forms, it cuts off the ameloblasts from the source of nourishment. From then, they are supplied by the capillaries of dental sac.', 'role': 'assistant'}]