This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Disease, Subject name: Ophthalmology
Xerostomia, Xerophthalmia area part of 
Select and explain. 
A. Sjogren syndrome, B. Riley day syndrome, C. Stevens - Johnson syndrome, D. Vitamin A deficiency
A: Sjogren syndrome
Answer: A: Sjogren syndrome 
Explanation: Ans. (a) Sjogren syndromeRef: Kanski 7/e, p. 124-126Sjogren syndrome is characterized by autoimmune inflammation and destruction of lacrimal and salivary glands - thus causing dryness of mouth and Xerosis or xerophthalmia.