<prompt> Which of the following are draining channels of cavernous sinus -a Inferior petrosal sinusb Inferior ophthalmic veinc Sphenoprietal sinusd Middle cerebral veine Superior ophthalmic veinababae  <response>: Draining channels communications of cavernous sinusInto transverse sinus through superior petrosal sinusInto internal jugular vein through inferior petrosal sinus and through a plexus around the ICAInto pterygoid plexus of veins through emissary veinsInto facial vein through superior ophthalmic veinRight and left cavernous sinus communicates with each other by anterior and posterior intercavernous sinuses and through basilar plexus of veins 