Medicine Differences between primary and secondary polycythemia -a) Increased red cell massb) Pruritisc) Hypertensiond) Arterial oxygen tension < 92% A c B d C ab D bd 💡 Explanation Differences between primary and secondary polycythemia -a) Increased red cell massb) Pruritisc) Hypertensiond) Arterial oxygen tension < 92% ✓ Correct Answer: D. bd