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
In normal diurnal variation, intraocular pressure is: 
Select and explain. 
A. Highest on awakening and lowest during evening, B. Lowest during morning and highest during evening, C. Highest in the morning and evening, D. Lowest in the morning and evening
A: Highest on awakening and lowest during evening
Answer: A: Highest on awakening and lowest during evening 
Explanation: Ans. Highest on awakening and lowest during evening