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: Anaesthesia
Site of lesion in Bitemporal hemianopia is ? 
Select and explain. 
A. Optic nerve, B. Optic tract, C. Optic chiasma, D. Optic radiation
C: Optic chiasma
Answer: C: Optic chiasma 
Explanation: Ans. is 'c' i.e., Optic chiasma Characteristic defect of central chiasmatic lesion is bitemporal hemianopia. This question has been asked in almost all the examinations. Site oflesion Visual field defect Optic nerveOptic chiasmaOptic tractLateral geniculate bodYOptic radiation (Total)Optic radiation lower fibres (temporal lobe)Optic radiation upper fibres (parietal lobe)Visual coex (anterior occipital coex)Occipital coex tiP BlindnessBitemporal hemianoPiaIncongruent homonymous hemianopiaHomonymous hemianoPiaHomonymous hemianopia, sornetimes with macular sparinqHomonymous upper quadrantanoPiaHomonymous I ower quadrantanoPiaffo*oo"rno"s hemianopia with macular sparingHomonymous macular defect