ما الحد الطبيعي التقريبي للصفائح عند البالغ؟

What is the approximate normal adult platelet range?

1. 10,000–50,000
2. 150,000–450,000
3. 1,000–5,000
4. 500,000–900,000

Answer: B) 150,000–450,000. Normal is about 150–450 ×10⁹/L; under 50 raises surgical bleeding risk and under 10–20 spontaneous bleeding risk.