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: Biochemistry
The dark adaptation time in Vitamin A deficiency is: 
Select and explain. 
A. Increased, B. Decreased, C. Unchanged, D. Fluctuating
A: Increased
Answer: A: Increased 
Explanation: Dark adaptation time is increased in vitamin A deficient individuals.
Reference: Satyanarayana- Biochemistry, 3rd edition, pg-121