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
[{'content': 'Which of the following is the commonest organism responsible for angular conjunctivitis? \nSelect and explain. \nA. Moraxella lacunata, B. Staphylococcus pyogenes, C. Herpes simplex, D. Haemophilus influenzae', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Angular conjunctivitis is characterised by a mild inflammation confined to the conjunctiva and lid margins near the angle. The commonest causative organism is Moraxella lacunata. Ref: A K Khurana, 2nd Edition, Page 88.', 'role': 'assistant'}]