Physiology Normal cardiac index in an adult is:- A 5.9 L/min/M2 B 2.3 L/min/M2 C 3.2 L/min/M2 D 4.6 L/min/M2 💡 Explanation Normal cardiac index in an adult is:- ✓ Correct Answer: C. 3.2 L/min/M2