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': 'Defect in amblyopia lies in: \nSelect and explain. \nA. Lateral geniculate body, B. Afferent pupillary reflex, C. Rods and cones, D. Retina', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Lateral geniculate body', 'role': 'assistant'}]