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': 'Dental papilla gives rise to \nSelect and explain. \nA. Pulp only, B. Pulp & Dentin, C. Pulp & periodontal ligament, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The cells of dental papilla will form pulp and dentin and the cells of dental sac will form cementum and periodontal ligament.', 'role': 'assistant'}]