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
Which of the following is not true for binocular single vision ? 
Select and explain. 
A. Provides stereoscopic vision, B. Is present since bih, C. Is the cause of diplopia in paralytic squint, D. Fusion is its second grade
B: Is present since bih
Answer: B: Is present since bih 
Explanation: Ans. Is present since bih