This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trauma, Subject name: Surgery
[{'content': 'The most preferred approach for pituitary surgery as the present time is \nSelect and explain. \nA. Transcranial, B. Transethmoidal, C. Trans-sphenoidal, D. Transcallosal', 'role': 'user'}, {'content': "Answer: C \nExplanation: PITUITARY TUMOURS Classification: 1. Eosinophil (Acidophil) adenomas 2. Chromophobe adenomas: Differential diagnosis: Meningiomas, aneurysms 3. Basophil adenomas 4. Prolactin-secreting adenomas Treatment: \x02 Surgery: By subfrontal craniotomy approach or transphenoidal approach. Care should be taken not to injure optic chiasma, aeries, cavernous sinus. Ref: SRB's Manual of Surgery, 4th Edition, pg. no. 1186", 'role': 'assistant'}]