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: Anatomy
[{'content': 'All are paired venous sinuses except - \nSelect and explain. \nA. Superior petrosal, B. Inferior petrosal, C. Superior sagittal, D. Transverse', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]