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: Social & Preventive Medicine
The earliest clinical sign of Vitamin A deficiency is – 
Select and explain. 
A. Conjunctival xerosis, B. Corneal xerosis, C. Bitots spots, D. Kerato malacia
A: Conjunctival xerosis
Answer: A: Conjunctival xerosis 
Explanation: None