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
During cataractogenesis lens stria appear at first in: 
Select and explain. 
A. Upper nasal quadrant, B. Lower nasal quadrant, C. Upper temporal quadrant, D. Lower temporal quadrant
B: Lower nasal quadrant
Answer: B: Lower nasal quadrant 
Explanation: Ans. Lower nasal quadrant