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
Unilateral watery discharge from the eye of a new born, with no edema or chemosis is due to – 
Select and explain. 
A. Chlamydia, B. Gonococcus, C. Sticky eye, D. Chemical conjunctivitis
D: Chemical conjunctivitis
Answer: D: Chemical conjunctivitis 
Explanation: Watery discharge, with no edema or swelling in a newborn is typical of chemical ophthalmia neonatorum.
In infective cause, there is mucopurulent or purulent discharge with marked edema and swelling.