What is true about RBCs in humans?

Options

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

Answer

B

Explanation

About 20 – 25% combines with the amino groups of amino acids and proteins in blood to form carbamino compound.
`underset("Hemoglobin")(Hb +CO_(2))rarr underset("Carbaminio-hemoglobin")(Hb-CO_(2))`