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
A person showing two cell lines derived from one zygote is 
Select and explain. 
A. Chimerism, B. Mosaicism, C. Segregation, D. Pseudo-dominance
B: Mosaicism
Answer: B: Mosaicism 
Explanation: None