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
Schirmer-I test measures: 
Select and explain. 
A. Total tear secretions, B. Basal tear secretions, C. Reflex tear secretions, D. All of the above
A: Total tear secretions
Answer: A: Total tear secretions 
Explanation: Ans. Total tear secretions