This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'The glomus tumour invasion of jugular bulb is diagnosed by \nSelect and explain. \nA. Carotid angiography, B. Veebral venous venography, C. X-ray, D. Jugular venography', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Jugular venography must be done to delineate multiple tumours, feeding vessels, embolization and involvement of jugular bulb, carotid aery or intradural extension. Ref: Dhingra 6th edition pg. 110', 'role': 'assistant'}]