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': 'A person showing two cell lines derived from one zygote is \nSelect and explain. \nA. Chimerism, B. Mosaicism, C. Segregation, D. Pseudo-dominance', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]