How much blood does a human body contain

How much blood does a human body contain
A: 3 4 liters
B: 5 6 liters
C: 6 7 liters
D: None of these

An average adult has about five to six liters of blood. The exact volume depends on body size sex and health. Blood carries oxygen nutrients hormones and immune cells. It also regulates temperature and pH. Quantitative physiology facts are common in basic science segments. Fix five to six liters for adults.