Identifying white blood cells by morphology

Steps:

• Observe cell X: small size, large round nucleus occupying most of cell, thin cytoplasm rim—matches lymphocyte.
• Observe cell Y: medium size, multi-lobed nucleus (3-5 lobes), pale granular cytoplasm—matches neutrophil.
• Observe cell Z: largest size, indented/kidney-shaped nucleus, abundant gray-blue cytoplasm—matches monocyte.
• Match sequence X-Y-Z to options for correct labeling.

Why B is correct:

• Option B sequences as lymphocyte (X), neutrophil (Y), monocyte (Z), aligning with standard hematological definitions of cell morphology under light microscopy.

Why the others are wrong:

• A: Incorrectly swaps Y (neutrophil) and Z (monocyte), misidentifying larger cell features.
• C: Starts with monocyte for X, ignoring small lymphocyte nucleus dominance.
• D: Assigns neutrophil to X, overlooking small size and single nucleus of lymphocytes.

Final answer: B