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
Most common cause of Neonatal conjunctivitis is 
Select and explain. 
A. Chlamydia, B. Chemical, C. Gonococcus, D. Herpes simplex
A: Chlamydia
Answer: A: Chlamydia 
Explanation: Most common cause of Neonatal conjunctivitis is Chlamydia.