This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pediatrics
[{'content': 'All of the following are causes of congenital blindness Except \nSelect and explain. \nA. Toxoplasmosis, B. Congenital rubella, C. Vitamin A deficiency, D. Cataract', 'role': 'user'}, {'content': "Answer: C \nExplanation: Causes of congenital blindness:ToxoplasmosisCongenital cataractsGenetic diseaseCongenital rubellaCongenital glaucomaUsher syndrome(Refer: Nelson's Textbook of Pediatrics, SAE, 1st edition, pg no. 318 - 319)", 'role': 'assistant'}]