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: Pathology
Break up time (BUT) test is done in 
Select and explain. 
A. Sjogren's syndrome, B. Multiple sclerosis, C. SLE, D. Myasthenia gravis
A: Sjogren's syndrome
Answer: A: Sjogren's syndrome 
Explanation: None