Which of the following statement is true about RBCs in humans?

Options

A. They do not carry `CO_(2)` at all
B. They carry about 20-25per cent of `CO_(2)`
C. They transport 99.5 per cent of `O_(2)`
D. They transport about 80 per cent oxygen only and the rest 20 per cent of it is transported in dissolved state in blood plasma.

Answer

2