This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lesions of the Visual Pathway, Subject name: Ophthalmology
Characteristic visual field defect in optic chiasma lesion - 
Select and explain. 
A. Homonymous hemianopia, B. Bitemporal hemianopia, C. Upper quadrantanopia, D. Lower quadrantanopia
B: Bitemporal hemianopia
Answer: B: Bitemporal hemianopia 
Explanation: Ans, is 'b' i.e,. Bitemporal hemianopia Site of lesionVisual field defectOptic nerveBlindnessOptic cbiasmaBitemporal hemianopiaOptic tractIncongruent homonymous hemianopiaLateral geniculate bodyHomonymous hemianopiaOptic radiation (Total)Homonymous hemianopia, sometimes with macular sparingOptic radiation lower fibres (temporal lobe)Homonymous upper quadrantanopiaOptic radiation upper fibres (parietal lobe)Homonymous lower quadrantanopiaVisual cortex (anterior occipital cortex)Homonymous hemianopia with macular sparingOccipital cortex tipHomonymous macular defect