Final answer:
The unit associated with cardiac index is L/min/m2, which allows comparison of cardiac outputs between individuals of different sizes.
Step-by-step explanation:
The unit associated with cardiac index is B. L/min/m2. Cardiac index is a hemodynamic parameter that relates the cardiac output from the left ventricle in one minute to body surface area, thus allowing a comparison of cardiac outputs between different sized individuals. The formula for calculating the cardiac index is CI = CO/BSA, where CI is the cardiac index, CO is the cardiac output in liters per minute (L/min), and BSA is the body surface area in square meters (m2).