Arrange the following in ascending order of their number per $m{m}^3$ present in blood.
(a) Basophils
(b) Lymphocytes
(c) Eosinophils
(d) Neutrophils
(e) Monocytes.

The correct option is D a$\to$ c$\to$ e$\to$ b$\to$ d

Neutrophils: 40% to 60%

Lymphocytes: 20% to 40%

Monocytes: 2% to 8%

Eosinophils: 1% to 4%

Basophils: 0.5% to 1%

So, the correct answer is 'a→ c→ e→ b→ d'.