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 tests helps to differentiate between concomitant squint and paralytic squint? 
Select and explain. 
A. Cover-uncover test, B. Direct cover test, C. Alternate cover test, D. None of the above
C: Alternate cover test
Answer: C: Alternate cover test 
Explanation: Ans. None of the above