Match the following with the types of leucocytes and their function.
`{:("(P) Neutrophils","(A) Heparin and Histamine"),("(Q) Basophils","(B) Antibody formation"),("(R) Acidophils","(C) Anti- allergic"),("(S) Lymphocytes","(D) Phagocytes"):}`

Options

A. P – (D), Q – (A), R – (C), S – (B)
B. P – (A), Q – (D), R – (C), S – (B)
C. P – (C), Q – (D), R – (B), S – (A)
D. P – (B), Q – (A), R – (C), S – (D)

Answer

To solve the question of matching the types of leucocytes with their respective functions, we will analyze each leucocyte type and its function step by step.

### Step-by-Step Solution:

1. **Identify Neutrophils (P)**:
- Neutrophils are the most abundant type of leukocytes, constituting around 65% of total leukocytes.
- Their primary function is phagocytosis, where they engulf and digest pathogens.
- **Match**: Neutrophils (P) → Phagocytes (D).

2. **Identify Basophils (Q)**:
- Basophils make up about 0.5-1% of total leukocytes.
- They are involved in allergic reactions and release substances like heparin (an anticoagulant) and histamine (which causes inflammation).
- **Match**: Basophils (Q) → Heparin and Histamine (A).

3. **Identify Acidophils (R)**:
- Acidophils are also known as eosinophils.
- They play a role in allergic reactions and are particularly involved in combating parasitic infections.
- They are associated with anti-allergic responses.
- **Match**: Acidophils (R) → Anti-allergic (C).

4. **Identify Lymphocytes (S)**:
- Lymphocytes are crucial for the immune response and are primarily involved in the formation of antibodies.
- They include B lymphocytes, which produce antibodies.
- **Match**: Lymphocytes (S) → Antibody formation (B).

### Final Matches:
- (P) Neutrophils → (D) Phagocytes
- (Q) Basophils → (A) Heparin and Histamine
- (R) Acidophils → (C) Anti-allergic
- (S) Lymphocytes → (B) Antibody formation

### Summary of Matches:
- P → D
- Q → A
- R → C
- S → B