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
Fixation reflex develops at the age of 
Select and explain. 
A. 2-4 months, B. 4-6 months, C. 6-8 months, D. 5-7 years
A: 2-4 months
Answer: A: 2-4 months 
Explanation: Fixation reflex 2-4 months.
Macular differentiation 4-6 months.
Stereopsis 5-7 years.