Which of the following is most abundant in blood.

Options

A. RBC
B. Lymphocyte
C. Monocyte
D. Platelet

Answer

To determine which component is most abundant in blood, we can break down the components of blood into two main categories: blood plasma and formed elements (cellular components).

### Step-by-Step Solution:

1. **Understanding Blood Composition**: Blood is made up of two primary components: blood plasma and formed elements. Blood plasma is the liquid part of the blood, while formed elements include various types of cells.

2. **Identifying Formed Elements**: The formed elements consist of:
- Red Blood Cells (RBCs)
- White Blood Cells (WBCs)
- Platelets (Thrombocytes)

3. **Percentage Composition**:
- RBCs make up approximately 45% of the total blood volume.
- WBCs and platelets together constitute a much smaller percentage of the blood volume (less than 1% for WBCs and around 1% for platelets).

4. **Conclusion**: Since RBCs occupy the largest proportion of the formed elements in blood, they are the most abundant component in blood.

5. **Final Answer**: The most abundant component in blood is Red Blood Cells (RBCs).