In a case of suspected poisoning, the preservative used for vitreous during autopsy is:
**Core Concept**
The question is testing knowledge about the preservation methods used in forensic pathology, specifically the use of chemicals to prevent putrefaction and contamination of the vitreous humor during autopsy.
**Why the Correct Answer is Right**
The correct answer involves the use of formaldehyde as a preservative. Formaldehyde is a potent disinfectant and antiseptic that prevents bacterial growth, which is essential in forensic pathology to maintain the integrity of the sample. Formaldehyde is commonly used in embalming fluids and as a preservative in biological specimens.
**Why Each Wrong Option is Incorrect**
* **Option A:** Glutaraldehyde is a strong disinfectant but is not typically used as a preservative for vitreous humor.
* **Option B:** Ethanol is used as a preservative in some biological samples, but it is not the preferred choice for vitreous humor in suspected poisoning cases.
* **Option D:** No information is provided for this option.
**Clinical Pearl / High-Yield Fact**
Formaldehyde is a known carcinogen and requires proper handling and disposal to prevent exposure.
**Correct Answer:** C. Formaldehyde.