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: Biochemistry
Which cell organelle contains DNA 
Select and explain. 
A. Mitochondrion, B. Golgi body, C. Endoplasmic reticulum, D. Centriole
A: Mitochondrion
Answer: A: Mitochondrion 
Explanation: None