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 to the Jugular bub, is diagnosed by \nSelect and explain. \nA. Carotid angiography, B. Vertebral venous angiography, C. X ray, D. Jugular venography', 'role': 'user'}, {'content': 'Answer: D \nExplanation: (Jugular venography) (214-15-LT) (140-41-LT) (108-D 4,h) (97-Maqbool 11th)Diagnosis of Glomus tumours* Carotid angiography and vertebral angiography will demonstrate the blood supply of the tumour* Jugular venography may demonstrate the extent of tumour invasion into the jugular bulb.MRI- will demonstrate the extent of tumour invasion* CT-scan head - helps to distinguish glomus tympanicum from the glomus jugular tumour by identification of carotico-jugular spine which is eroded in later CT-scan also helps to differentiate it from the aberrant carotid artery, high or dehiscent jugular bulbMRI- MR angiography and venography further help to delineate invasion of jugular bulb and vein or compression of the carotid artery.* Four vessel angiography - useful to found out extent of tumor, compression of internal carotid artery.* Diagnostic biopsy is CONTRAINDICATEDTreatment - smaller tumour are excised. Larger lesions may be treated by radiotherapy followed by surgery', 'role': 'assistant'}]