The correct floral formula of soybean is

$\displaystyle \%$ ⚥ $\displaystyle \mathrm{K}_{(5)} \mathrm{C}_{1+(2)+2} \mathrm{~A}_{(9)+1} \mathrm{G}_{\overline{1}}$

$\displaystyle \%$ ⚥ $\displaystyle \mathrm{K}_5 \mathrm{C}_{1+(2)+2} \mathrm{~A}_{(9)+1} \mathrm{G}_{\underline{1}}$

$\displaystyle \%$ ⚥ $\displaystyle \mathrm{K}_{(5)} \mathrm{C}_{1+2+(2)} \mathrm{A}_{(9)+1} \mathrm{G}_{\underline{1}}$

$\displaystyle \%$ ⚥ $\displaystyle \mathrm{K}_{(5)} \mathrm{C}_{1+2+(2)} \mathrm{A}_{1+(9)} \mathrm{G}_{\underline{1}}$