## **Core Concept**
Savlon is a widely used antiseptic solution. Its active ingredients are crucial for its antimicrobial properties. The core concept here revolves around the identification of these ingredients.

## **Why the Correct Answer is Right**
The correct answer, **D. Chlorhexidine and cetrimide**, is right because Savlon is a solution containing a combination of chlorhexidine (an antiseptic) and cetrimide (a surfactant and antiseptic). Chlorhexidine acts by disrupting the cell membrane of bacteria, leading to their death. Cetrimide enhances the action of chlorhexidine and also has antimicrobial properties. This combination provides a broad spectrum of antimicrobial activity.

## **Why Each Wrong Option is Incorrect**
- **Option A:** is incorrect because while hydrogen peroxide is an antiseptic, it is not a component of Savlon.
- **Option B:** is incorrect as benzalkonium chloride is another type of antiseptic but not a component of Savlon.
- **Option C:** is incorrect because although cetrimide is indeed a component, chlorhexidine is the other critical component, making option D more accurate.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that Savlon, with its active ingredients chlorhexidine and cetrimide, is commonly used for skin and wound disinfection. It's essential to differentiate it from other antiseptics like Dettol (which contains chloroxylenol) and to recall its specific use in medical and surgical practices.

## **Correct Answer:**
**Correct Answer: D. Chlorhexidine and cetrimide**