The condition in which there is a DECREASE in the number of white blood cells in humans is called

• A. leukocytosis (pron: lew-kO-sigh-toe-sis)
• B. leukopenia (pron: lew-kO-pea-nee-ah)
• C. leukemia (pron: lew-kee-me-ah)
• D. leukohyperia (pron: lew-kO-high-per-e-ah)