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': 'What is the chromosomal aberration seen when there is transverse division in centromere: \nSelect and explain. \nA. Ring chromosome, B. Isochromosome, C. Translocation, D. Inversion', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]