'Leukopenia' is an abnormal ______.

decrease in white blood cells

The correct answer is Option (2) – decrease in white blood cells

'Leukopenia' is an abnormal: Decrease in white blood cells

Explanation:

• Leukopenia is a condition characterized by a lower than normal number of white blood cells (leukocytes) in the blood.
• The term "leukopenia" is derived from "leuko-" meaning white, and "-penia" meaning deficiency. Therefore, leukopenia specifically refers to a deficiency or decrease in the white blood cell count.
• White blood cells play a crucial role in the immune system, and a decrease in their number can compromise the body's ability to fight infections and diseases.