**Question:** In macerated fetus, the organ used for DNA profiling is

A. Brain
B. Liver
C. Blood
D. Skin

**Core Concept:**
Macerated fetus refers to a decomposed fetus where the soft tissues have been broken down by enzymes such as lipase and protease. This can lead to fragmentation and degradation of DNA, making DNA profiling more challenging. In such cases, the most suitable organ for DNA extraction and profiling is typically the skin, as the outer layer acts as a protective barrier against enzymatic degradation and maintains the integrity of DNA.

**Why the Correct Answer is Right:**
In macerated fetus cases, the skin is the preferred organ for DNA profiling due to its unique properties. It acts as a protective barrier against enzymatic degradation, which helps maintain the DNA's integrity despite the decomposition process. This allows for successful extraction and profiling of the DNA, leading to accurate identification.

**Why Each Wrong Option is Incorrect:**
1. **Option A (Brain):** DNA in the brain is more vulnerable to enzymatic degradation due to the higher cellular activity and lack of protective outer layer. This makes it an unsuitable choice for DNA profiling in macerated fetus cases.
2. **Option B (Liver):** Similar to the brain, the liver lacks a protective outer layer and experiences high cellular activity, leading to DNA degradation. Thus, it is not the optimal choice for DNA profiling in macerated fetus cases.
3. **Option D (Blood):** Blood is also affected by enzymatic degradation due to its cellular nature and lack of an outer protective layer. This makes it an unsuitable organ for DNA profiling in macerated fetus cases.

**Clinical Pearl:**
In forensic cases involving decomposed remains, particularly macerated fetus cases, the skin is the preferred organ for DNA profiling due to its protective outer layer and relative resistance to enzymatic degradation. This knowledge can aid in successful identification and resolution of criminal investigations involving decomposed remains.