system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Angular vein infection may cause thrombosis of:
assistant
The correct answer is  (a) Cavernous sinus(Ref. Scott Brown, 8th ed., Vol 1; 965)Angular vein (from the medial angle of the eye) continues as the facial vein which through the deep facial vein communicates with the cavernous sinus through the pterygoid plexus of veins.