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: Pathology
True about mitochondrial DNA:
(A)Linear
(B)Circular
(C)Transmitted by mother only
(D)Transmitted by both parents
(E)Contains less gene than nuclear DNA 
Select and explain. 
A. BCE, B. ABD, C. DAE, D. CAB
A: BCE
Answer: A: BCE 
Explanation: None