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': 'Safest site for IM injection in children: \nSelect and explain. \nA. Vastus lateralis, B. Dorsogluteal., C. Deltoid., D. Ventrogluteal.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]