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: Anatomy
[{'content': 'Inner ear fully developed at \nSelect and explain. \nA. 4 weeks, B. 10 weeks, C. 20 weeks, D. 32 weeks', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is \'c\' i.e., 20 weeksDevelopment of membranous internal ear is completed by 10" weeks and reaches its adult size and shape by 20-22 weeks when the cochlea is developed sufficiently.', 'role': 'assistant'}]