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: ENT
[{'content': 'About skull of newborn, true are all except- \nSelect and explain. \nA. Paranasal sinuses are absent, B. Absent diploic spaces, C. Middle ear ossicles are of same size as in adults, D. Mastoid process is not completely formed', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]