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 fundus, first sign of raised intracranial pressure is: 
Select and explain. 
A. Filling of physiological cup, B. Blurring of nasal disc, C. Dilatation of vessels, D. None of the above
C: Dilatation of vessels
Answer: C: Dilatation of vessels 
Explanation: Ans. Dilatation of vessels