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': 'Familial retinoblastoma: \nSelect and explain. \nA. Has autosomal recessive inheritance, B. More commonly bilateral, C. Due to mutation, D. More common than sporadic retinoblastoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. More commonly bilateral', 'role': 'assistant'}]