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: Pharmacology
Which of the following Tetracycline can be used in renal failure wihtout dose adjustment: 
Select and explain. 
A. Oxytetracycline, B. Doxycycline, C. Minocycline, D. Demiclocycline
B: Doxycycline
Answer: B: Doxycycline 
Explanation: Doxycycline