Mark the blood cells which are nucleated in case of humans

Options

A. Erythrocytes
B. Leucocytes
C. Blood platelets
D. Both (1) & (3)

Answer

To answer the question about which blood cells are nucleated in humans, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Components of Blood**:
- Blood consists of three main components: Red Blood Cells (RBCs), White Blood Cells (WBCs), and Platelets.

2. **Understand the Characteristics of Each Component**:
- **Red Blood Cells (RBCs)**: These cells are responsible for transporting oxygen throughout the body. They contain hemoglobin, which gives them their red color. Importantly, in humans, RBCs are enucleated, meaning they do not have a nucleus.
- **White Blood Cells (WBCs)**: Also known as leukocytes, these cells are part of the immune system and help fight infections. WBCs are nucleated, meaning they contain a nucleus.
- **Platelets**: These are cell fragments involved in blood clotting. In humans, platelets are also considered to have a nucleus, although they are not complete cells like WBCs.

3. **Determine Which Cells Are Nucleated**:
- From the above information, we can conclude that:
- **RBCs**: Enucleated (no nucleus)
- **WBCs**: Nucleated (have a nucleus)
- **Platelets**: Nucleated (considered to have a nucleus)

4. **Final Answer**:
- The nucleated blood cells in humans are **White Blood Cells (WBCs)** and **Platelets**. Therefore, the correct answer is that both WBCs and Platelets are nucleated.