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
Visual field defect in pituitary tumour with supracellar extension is 
Select and explain. 
A. Bitemporal hemianopia, B. Binasal hemianopia, C. Homonymous hemianopia, D. Pie in the sky vision
A: Bitemporal hemianopia
Answer: A: Bitemporal hemianopia 
Explanation: A i.e. Bitemporal hemianopia