Veins communicating the cavernous sinus to pterygoid plexus pass through fossa of :

B i.e. Vesalius; C i.e. OvaleForamen Vesalius is an inconstant foramen that gives passage to an emissary vein that connects pterygoid venous plexus with cavernous sinus (vein of vesalius)Q. It is also k/a sphenoidal emissary foramen as its seen in the great wing of sphenoid, medial to foramen ovale, opposite the root of pterygoid process. When present it opens below near scaphoid fossa (in the pterygoid process of sphenoid & gives origin to tensor vali patatini)Langer's (Axillopectoral) muscle/ Axillary Arch: A muscle originating from coracoid- process of scapula, extending to long head of triceps and adhering to both triceps brachii & tendinous pa of latissimus dorsi muscle.