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
Conjunctival Xerosis is seen in: 
Select and explain. 
A. Vitamin-A deficiency, B. Trachoma, C. Pemphigus, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: All of the above