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
[{'content': 'Which of the following tests helps to differentiate between concomitant squint and paralytic squint? \nSelect and explain. \nA. Cover-uncover test, B. Direct cover test, C. Alternate cover test, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. None of the above', 'role': 'assistant'}]