Question

Choose the odd one out:

• A. Basophils
• B. Neutrophils
• C. Monocytes
• D. Eosinophils

Answer 1

The correct option is C

Monocytes

The correct option is C.

Explanation of the correct option:

1. All other cells are granulocytes, except monocytes, which are agranulocytes.
2. The myeloid cell line in the bone marrow includes monocytes.
3. They make up between 5 and 10 percent of all circulating leukocytes and are largely involved in the immunological response to bacterial infection.

Explanation of the incorrect option:

Option A:

1. Granular leukocytes of the myeloid lineage are basophils.
2. They feature a bilobed, S-shaped nucleus with a diameter of 14–16 m.
3. Basophils live for around two weeks and circulate in the peripheral circulation.

Option B:

1. Granular leukocytes known as neutrophils are formed in the bone marrow from the myeloid cell lineage.
2. With 40 to 70 percent of leukocytes in peripheral blood, they are the most prevalent kind.

Option D:

They are granular leukocytes from the myeloid cell line in the bone marrow, and they are named thus because they histologically stain with eosin.

Final answer: Monocytes are the odd one out here since all other cells mentioned in the question are granulocytes.