Active substance in Dakins skin dressing agent used in burns is ?
**Core Concept**
The question is testing knowledge of topical antimicrobial agents used in burn care, specifically the active ingredient in Dakin's solution. **Dakin's solution** is a type of antiseptic solution used to prevent infection in burns.
**Why the Correct Answer is Right**
Dakin's solution contains **sodium hypochlorite**, which is the active substance responsible for its antimicrobial properties. Sodium hypochlorite works by releasing **hypochlorous acid**, a potent antimicrobial agent that disrupts microbial cell membranes, ultimately leading to cell death.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not the active ingredient in Dakin's solution.
**Option B:** Incorrect as it is not related to the antimicrobial action of Dakin's solution.
**Option C:** Incorrect because, although it may have antimicrobial properties, it is not the active substance in Dakin's solution.
**Option D:** Incorrect as it is not the primary active ingredient in Dakin's solution.
**Clinical Pearl / High-Yield Fact**
Remember, **sodium hypochlorite** solutions like Dakin's are used for their broad-spectrum antimicrobial activity in burn wounds, but their use must be carefully managed due to potential tissue toxicity.
**Correct Answer:** D. Sodium hypochlorite