This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Microbiology
The best skin disinfectant: 
Select and explain. 
A. Alcohol, B. Betadine, C. Savlon, D. Phenol
B: Betadine
Answer: B: Betadine 
Explanation: Ans. is 'b' i.e., Betadine (Ref: Ananthanarayan, 9th/e)Best skin disinfectant is Povidone iodine, Aqueous and alcohol based povidone iodine preparations are widely used in skin disinfection and skin preparation of the skin.Savlon and Dettol are more active against gram positive bacteria than gram negative bacteria.