This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nasolacrimal Disorders, Subject name: Ophthalmology
Which of the following is not true regarding schirmer test:- 
Select and explain. 
A. Measures combined basal and reflex tear secretion, B. Relatively specific, but poorly sensitive, C. Eyes closed/blink normally for 5 minutes, D. Useful in non co-operative adults and children
D: Useful in non co-operative adults and children
Answer: D: Useful in non co-operative adults and children 
Explanation: The Schirmer's I test Measures combined basal and reflex tear secretion Relatively specific, but poorly sensitive Eyes closed / blink normally for 5 minutes Not useful in non co-operative adults and children Amount of wetting >10mm -normal 5-10mm -borderline < 5 mm is abnormal 5-minute Schirmer test with and without anesthesia is abnormal <5 mm with anesthesia <10 mm without anesthesia The Schirmer's II test Measures reflex tearing Addition of nasal mucosal irritation with a cotton tipped applicator Amount of wetting < 15 mm after 5 minutes - abnormal reflex secretion -moderate to severe dry eye For differentiating non-Sjogren's from Sjogren's syndrome Patient cooperation is essential for performing the test.