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
Preauricular lymph nodes may be enlarged in all except: 
Select and explain. 
A. Bacterial conjunctivitis, B. Viral conjunctivitis, C. Allergic conjunctivitis, D. Chlamydial conjunctivitis
C: Allergic conjunctivitis
Answer: C: Allergic conjunctivitis 
Explanation: Ans., Allergic conjunctivitis