Blood stains ar found at the site of a murder. If DNA profiling technique is to be used for identifying the criminal. Which of the following is ideal for use

Options

A. Serum
B. Erythrocytes
C. Leucocytes
D. Platelets

Answer

To solve the question regarding which component of blood is ideal for DNA profiling in identifying a criminal, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Components of Blood**: Blood consists of several components, including red blood cells (erythrocytes), white blood cells (leukocytes), platelets, and plasma (serum).

2. **Identify the Role of Each Component**:
- **Erythrocytes (Red Blood Cells)**: These cells are responsible for oxygen transport. They are unique because they lack a nucleus, which means they do not contain DNA.
- **Leukocytes (White Blood Cells)**: These cells are part of the immune system and are larger than red blood cells. They contain a nucleus and, therefore, have DNA.
- **Platelets**: These are cell fragments involved in blood clotting. They also do not have a nucleus and, consequently, do not contain DNA.
- **Serum**: This is the liquid part of blood after clotting, which does not contain any blood cells, hence lacks DNA.

3. **Determine the Ideal Component for DNA Profiling**: Since DNA is found in the nucleus of cells, the ideal component for DNA profiling in this context would be leukocytes (white blood cells), as they are the only blood component that contains a nucleus and therefore DNA.

4. **Conclusion**: The ideal component for DNA profiling from the blood stains found at the site of a murder is leukocytes (white blood cells).

### Final Answer:
Leukocytes (white blood cells) are the ideal choice for DNA profiling in this scenario.