This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
Fluoroquinolone with highest oral bioavailability 
Select and explain. 
A. Gemifloxacin, B. Norfloxacin, C. Ciprofloxacin, D. Levofloxacin
A: Gemifloxacin
Answer: A: Gemifloxacin 
Explanation: Fluoroquinolones:- * Gemifloxacin is a third generation fluoroquinolone having absolute oral bioavailability. * All third generation fluoroquinolones: Sparfloxacin, Gatifloxacin and Gemifloxacin have 100% oral biovailability. * Among the Fluoroquinolones, Norfloxacin has the least oral bioavailability. Ref:- HL & KK Sharma's Principles of Pharmacology 3rd Ed; Pg Num:- 724