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: Pathology
[{'content': 'Which of the following is true about autosomal dominant: \nSelect and explain. \nA. Variable age of onset, B. Reduced penetrance, C. Variable expressibility, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Autosomal dominant disorders:\n\nVariable age of onset.\nReduced penetrance.\nVariable expressibility.', 'role': 'assistant'}]