Physiology Central cyanosis not occurs when total Hb and reduced Hb level is respectively (in gmdeg/o): A 10.9 & 4.1 B 10.9 & 5.110.9 & 6.1 C 8.9 & 4.1 D All 💡 Explanation Central cyanosis not occurs when total Hb and reduced Hb level is respectively (in gmdeg/o): ✓ Correct Answer: A. 10.9 & 4.1