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': "Test for visual acuity in a baby of age <1 year is \nSelect and explain. \nA. Electro retinography, B. Electro oculography, C. Snellen's chart, D. Optical Coherence tomography", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Test for visual acuity in an infant is Electro retinography.', 'role': 'assistant'}]