This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Microbiology Pa 1 (History, Microscopy, Stains and Structure and Physiology of Bacteria), Subject name: Microbiology
The best antiseptic is? - 
Select and explain. 
A. Alcohol, B. Betadine, C. Savlon, D. Phenol
B: Betadine
Answer: B: Betadine 
Explanation: Betadine, povidone, and isodine are the common iodophor compounds that contain 2-10% of available iodine. They are used to prepare skin and mucous membranes for surgery and in surgical hand scrubs and known as best antiseptics. Iodine is used as a skin antiseptic and kills microorganism by oxidizing cell constituents and iodinating cell proteins