This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
Bitemporal hemianopic field defect is charactersitic of: 
Select and explain. 
A. Glaucoma, B. Optic neuritis, C. Pituitary tumour, D. Retinal detachment
C: Pituitary tumour
Answer: C: Pituitary tumour 
Explanation: C i.e. Pituitary tumour