What is a normal platelet count?

• A. 50,000-100,000
• B. 100,000-150,000
• C. 150,000-400,000
• D. 400,000-600,000

Answer: (C)

Normal platelet count reflects the blood’s ability to form clots to stop bleeding without promoting abnormal clots. The usual reference range is about 150,000 to 400,000 platelets per microliter of blood. Counts in this range generally support normal hemostasis. Values below this range (thrombocytopenia) raise the risk of bleeding, especially with trauma or procedures, and can occur with bone marrow suppression, certain medications, or immune destruction. Values above this range (thrombocytosis) raise the risk of clot formation, which can be seen with inflammation, iron deficiency, infection, or myeloproliferative conditions. In practice, clinicians interpret platelet counts alongside symptoms and other lab data to guide care.