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
Night blindness may be caused by all except 
Select and explain. 
A. Vitamin A deficiency, B. Retinitis pigmentosa, C. Syphilis, D. Lattice degeneration
D: Lattice degeneration
Answer: D: Lattice degeneration 
Explanation: Ans. Lattice degeneration