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: Microbiology
Which of the following characteristics of bacteria is not true? 
Select and explain. 
A. Unicellular, B. Free living, C. Having either DNA or RNA, D. Cell wall containing muramic acid
C: Having either DNA or RNA
Answer: C: Having either DNA or RNA 
Explanation: None