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: ENT
[{'content': 'Regarding cochlear implant, which of the following is true - \nSelect and explain. \nA. Not contraindicated in cochlear malformation, B. Contraindicated in < 5 yrs, C. Indicated in mild to moderate hearing loss, D. Implanted through oval window', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]