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
Earliest symptom of Congenital Glaucoma 
Select and explain. 
A. Lacrimation, B. Blepharospasm, C. photophobia, D. Diminision of vision
C: photophobia
Answer: C: photophobia 
Explanation: Earliest but nonspecific symptom of Congenital Glaucoma is photophobia