Chapter 16, Problem 16RA

All of the following can bond with hemoglobin except

$\begin{array}{l}\text{a}{\text{. HCO}}_{\text{3}}-\hfill \\ \text{b}{\text{. O}}_{\text{2}}.\hfill \\ \text{c}{\text{. H}}^{\text{+}}\text{.}\hfill \\ \text{d}{\text{. CO}}_{\text{2}}\text{.}\hfill \\ \text{e}\text{. NO}\text{.}\hfill \end{array}$