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': 'Which of the following are draining channels of cavernous sinus -a) Inferior petrosal sinusb) Inferior ophthalmic veinc) Sphenoprietal sinusd) Middle cerebral veine) Superior ophthalmic vein \nSelect and explain. \nA. a, B. b, C. ab, D. ae', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Draining channels (communications) of cavernous sinus\n\nInto transverse sinus through superior petrosal sinus\nInto internal jugular vein through inferior petrosal sinus and through a plexus around the ICA\nInto pterygoid plexus of veins through emissary veins\nInto facial vein through superior ophthalmic vein\nRight and left cavernous sinus communicates with each other by anterior and posterior intercavernous sinuses and through basilar plexus of veins', 'role': 'assistant'}]