In mammlian RBC, the percentage of haemoglobin is

Options

A. `10%`
B. `20%`
C. `34%
D. `48%`

Answer

To solve the question regarding the percentage of hemoglobin in mammalian red blood cells (RBC), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Red Blood Cells (RBCs)**:
- Red blood cells are responsible for transporting oxygen throughout the body.
- They derive their red color from the presence of hemoglobin, which is a protein that binds to oxygen.

2. **Composition of Hemoglobin**:
- Hemoglobin is composed of protein and ferrous iron (Fe²⁺), which is crucial for oxygen binding.
- The presence of hemoglobin is what allows RBCs to carry oxygen efficiently.

3. **Percentage of Hemoglobin in RBCs**:
- When considering the dry weight of red blood cells, hemoglobin constitutes about 96% of the RBCs.
- However, in terms of the watery content (the state in which hemoglobin is found in the cells), hemoglobin makes up approximately 34% of the total content of the red blood cells.

4. **Conclusion**:
- Based on the information provided, the correct answer to the question is that the percentage of hemoglobin in mammalian RBCs is around 34%. Therefore, the correct option is option 3.

### Final Answer:
The percentage of hemoglobin in mammalian RBC is approximately 34%.

---