Consider the following statements (A-C) each with one or two blanks.
(A) `underline((1))` are the most abundant cells (60-65%) of the total WBCs and `underline((2))` are the least (0.5-1%) among them.
(B) Platelets are cell fragments produced from `underline((3))`
(C) During clot formation, fibrins are formed by the conversion of inactive `underline((4))` in the plasma by the enzyme `underline((5))`
Which one of the following options, gives the correct fill ups for the respective blank numbers from (1) to (5) in the statements ?

Options

A. (a) (1)-neutrophils, (2)-basophils, (4)-fibrinogens, (5)-thrombin
B. (b) (3)-mast cells, (4)-thrombokinase, (5)-prothrombin
C. (c) (3)-megakaryocytes, (4)-prothrombin, (5)-thrombin
D. (d) (1)-basophils, (2)-neutrophils, (3)-reticulocytes

Explanation

To solve the question, we need to fill in the blanks in the statements provided based on our knowledge of blood components and their functions. Let's break it down step by step:

### Step-by-Step Solution:

1. **Statement A**:
- The first blank (1) refers to the most abundant white blood cells (WBCs).
- The most abundant WBCs are **neutrophils**, which make up about 60-65% of the total WBC count.
- The second blank (2) refers to the least abundant WBCs.
- The least abundant WBCs are **basophils**, which constitute about 0.5-1% of the total WBC count.
- Therefore, the filled statement is:
- (A) **Neutrophils** are the most abundant cells (60-65%) of the total WBCs and **basophils** are the least (0.5-1%) among them.

2. **Statement B**:
- The third blank (3) asks what platelets are produced from.
- Platelets are cell fragments produced from **megakaryocytes**.
- Therefore, the filled statement is:
- (B) Platelets are cell fragments produced from **megakaryocytes**.

3. **Statement C**:
- The fourth blank (4) refers to the inactive form of a protein that is converted during clot formation.
- The inactive form is **fibrinogen**.
- The fifth blank (5) asks for the enzyme that converts fibrinogen into fibrin during clot formation.
- The enzyme responsible for this conversion is **thrombin**.
- Therefore, the filled statement is:
- (C) During clot formation, fibrins are formed by the conversion of inactive **fibrinogen** in the plasma by the enzyme **thrombin**.

### Final Statements:
- (A) Neutrophils are the most abundant cells (60-65%) of the total WBCs and basophils are the least (0.5-1%) among them.
- (B) Platelets are cell fragments produced from megakaryocytes.
- (C) During clot formation, fibrins are formed by the conversion of inactive fibrinogen in the plasma by the enzyme thrombin.

### Correct Fill-Ups:
1. Neutrophils
2. Basophils
3. Megakaryocytes
4. Fibrinogen
5. Thrombin

The correct option that matches these answers is **Option A**.