Find out the correct match about blood :

Options

A. Formed elements : about 55% of the blood
B. Plasma : about 45% of the blood
C. Haemoglobin : about 12-16 gm per 100 ml of blood
D. All of the above are correct match

Answer

To solve the question "Find out the correct match about blood," we will analyze each statement provided in the options:

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- **Statement:** Formed elements constitute about 55% of the blood.
- **Evaluation:** This statement is incorrect. Formed elements, which include red blood cells (RBCs), white blood cells (WBCs), and platelets, actually make up about 45% of the total blood volume.
- **Conclusion:** This statement does not match correctly.

**Hint:** Remember that formed elements are primarily the cellular components of blood, and they do not make up the majority.

2. **Analyze the Second Statement:**
- **Statement:** Plasma constitutes about 45% of the blood.
- **Evaluation:** This statement is also incorrect. Plasma constitutes about 55% of the total blood volume. Plasma is a yellowish liquid that carries cells, nutrients, hormones, and waste products.
- **Conclusion:** This statement does not match correctly.

**Hint:** Plasma is the liquid component of blood and is more than half of the total blood volume.

3. **Analyze the Third Statement:**
- **Statement:** Hemoglobin is about 12 to 16 grams per 100 ml of blood.
- **Evaluation:** This statement is correct. Hemoglobin, the protein in red blood cells responsible for oxygen transport, is indeed present in this concentration in healthy adults.
- **Conclusion:** This statement matches correctly.

**Hint:** Hemoglobin is crucial for oxygen transport; knowing its normal range is important in understanding blood health.

4. **Analyze the Fourth Statement:**
- **Statement:** All of the above are correct matches.
- **Evaluation:** Since the first two statements are incorrect, this statement is also incorrect.
- **Conclusion:** This statement does not match correctly.

**Hint:** If any individual statement is incorrect, then the claim that all are correct cannot be true.

### Final Answer:
The correct match about blood is the third option: **Hemoglobin is about 12 to 16 grams per 100 ml of blood.**