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': 'Most uncommon type of latent strabismus is: \nSelect and explain. \nA. Esophoria, B. Exophoria, C. Hyperphoria, D. Cyclophoria', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Cyclophoria', 'role': 'assistant'}]