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
The most preferred approach for pituitary surgery as the present time is 
Select and explain. 
A. Transcranial, B. Transethmoidal, C. Trans-sphenoidal, D. Transcallosal
C: Trans-sphenoidal
Answer: C: Trans-sphenoidal 
Explanation: PITUITARY TUMOURS Classification: 1. Eosinophil (Acidophil) adenomas 2. Chromophobe adenomas: Differential diagnosis: Meningiomas, aneurysms 3. Basophil adenomas 4. Prolactin-secreting adenomas Treatment:  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