Find the correct descending order of percentage proportion of leucocytes in human blood.

Options

A. Neutrophils `rarr` Basophils `rarr` Lymphocytes `rarr` Acidophils (Eosinophils) `rarr` Monocytes
B. Monocytes `rarr` Neutrophils `rarr` Lymphocytes `rarr` Acidophils `rarr` Basophils
C. Neutrophils `rarr` Lymphocytes `rarr` Monocytes `rarr` Acidophils `rarr` Basophils
D. Lymphocytes `rarr` Acidophils `rarr` Basophils `rarr` Neutrophils `rarr` Monocytes

Explanation

To find the correct descending order of the percentage proportion of leucocytes in human blood, we need to know the typical percentages of each type of leucocyte. Here's a step-by-step solution:

### Step 1: Identify the Types of Leucocytes
The main types of leucocytes (white blood cells) in human blood are:
1. Neutrophils
2. Lymphocytes
3. Monocytes
4. Eosinophils (also referred to as Acidophils)
5. Basophils

### Step 2: Know the Percentage Proportions
The typical percentage proportions of these leucocytes in human blood are as follows:
- **Neutrophils**: 60-65%
- **Lymphocytes**: 20-25%
- **Monocytes**: 6-8%
- **Eosinophils (Acidophils)**: 2-3%
- **Basophils**: 0.5-1%

### Step 3: Arrange in Descending Order
Now we will arrange these leucocytes in descending order based on their percentage proportions:
1. **Neutrophils**: 60-65%
2. **Lymphocytes**: 20-25%
3. **Monocytes**: 6-8%
4. **Eosinophils (Acidophils)**: 2-3%
5. **Basophils**: 0.5-1%

### Step 4: Write the Final Order
The correct descending order of the percentage proportion of leucocytes in human blood is:
- Neutrophils
- Lymphocytes
- Monocytes
- Eosinophils (Acidophils)
- Basophils

### Final Answer:
**Neutrophils > Lymphocytes > Monocytes > Eosinophils (Acidophils) > Basophils**

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