Which of the following used as skin antiseptic?
**Core Concept**
The question is testing the knowledge of various antiseptics used in skin disinfection. Skin antiseptics are chemical agents applied to the skin to reduce the growth of microorganisms and prevent infection.
**Why the Correct Answer is Right**
The correct answer is likely **B. Chlorhexidine**. Chlorhexidine is a broad-spectrum antimicrobial agent commonly used as a skin antiseptic. It works by disrupting the cell membranes of bacteria, leading to their death. Chlorhexidine is effective against a wide range of microorganisms, including Gram-positive and Gram-negative bacteria, fungi, and viruses.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not specified, but common antiseptics like hydrogen peroxide, povidone-iodine, or ethanol may be incorrect depending on the context.
**Option C:** This option is also not specified, but other antiseptics like benzalkonium chloride or cetrimide may be incorrect depending on the context.
**Clinical Pearl / High-Yield Fact**
Chlorhexidine gluconate 2% solution is a commonly used skin antiseptic for preoperative skin preparation and as a hand sanitizer. It is also used in mouthwashes to reduce dental plaque and gingivitis.
**Correct Answer:** B. Chlorhexidine.