Identifying white blood cells by nuclear morphology

Steps:

• Examine cell size and nucleus shape: monocytes are largest with indented/kidney-shaped nuclei, lymphocytes are small with round nuclei, neutrophils have multilobed nuclei.
• Cell X: large size, kidney-shaped nucleus indicates monocyte.
• Cell Y: small size, dense round nucleus indicates lymphocyte.
• Cell Z: segmented multilobed nucleus with granules indicates neutrophil.

Why C is correct:

• C assigns monocyte to X, lymphocyte to Y, and neutrophil to Z, matching standard histological definitions of white blood cell morphology.

Why the others are wrong:

• A: Swaps X (monocyte) as lymphocyte and Y (lymphocyte) as neutrophil, ignoring size and nucleus shape.
• B: Mislabels X as lymphocyte (too small for monocyte) and Y as monocyte (lacks indented nucleus).
• D: Incorrectly places neutrophil as X (no multilobed nucleus) and monocyte as Z (wrong for segmented nucleus).

Final answer: C