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
Headache with bitemporal hemianopia with 6/6 vision is seen in: 
Select and explain. 
A. Optic neuritis, B. Trauma, C. Chiasmal lesion, D. Bilateral cavernous lesion
C: Chiasmal lesion
Answer: C: Chiasmal lesion 
Explanation: Ans. Chiasmal lesion