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 two different zygotes is known as - 
Select and explain. 
A. Chimerism, B. Mosaicism, C. Seggregation, D. Pseudo-dominance
A: Chimerism
Answer: A: Chimerism 
Explanation: None