Question

Match the different types of Leucocytes (Column-I) with their percentage of occurrence (Column-II) in a healthy adult human and choose the correct answer.

Column-I		Column-II
1	Neutrophils	(p)	6-8%
2	Lymphocytes	(q)	60-65%
3	Monocytes	(r)	0.5-1%
4	Basophils	(s)	2-3%
5	Eosinophils	(t)	20-25%

Choose the correct options :

• A. (I)-(q), (2)-(r). (3) - (s), (4) - (t), (5)-(p)
• B. (I)-(r), (2)-(s), (3)-(t), (4)-(q). (5)-(p)
• C. (I) (q), (2)-(t), (3)-(r), (4) - (s), (5)-(p)
• D. (I) (q). (2)-(t), (3)-(p), (4) - (r), (5)-(s)

Answer 1

The Correct Option is D

1. Neutrophils: Most abundant white blood cells, constituting 60-65% (q) of total leucocytes.

2. Lymphocytes: Second most common, making up 20-25% (t) of white blood cells.

3. Monocytes: Account for 2-3% (s) of circulating leucocytes.

4. Basophils: Least common, only 0.5-1% (r) of total white blood cells.

5. Eosinophils: Represent 6-8% (p) of leucocytes.

The correct matching is therefore: (1)-(q), (2)-(t), (3)-(s), (4)-(r), (5)-(p)

Thus, the correct option is (D) (1) - (q), (2) - (t), (3) - (p), (4) - (r), (5) - (s).

Answer 2

Option (D) provides the correct matching of leukocyte types with their normal percentage ranges in human blood. 

Neutrophils, the most abundant white blood cells at 60-65%, are the body's first line of defense against bacterial infections.

Lymphocytes, comprising 20-25%, are vital for adaptive immunity through B and T cells. 

Monocytes make up 2-3% and mature into macrophages that phagocytose pathogens. 

Basophils, the rarest at 0.5-1%, release histamine in allergic responses. 

Eosinophils account for 6-8% and combat parasitic infections.