Selina claims single having one exemption. Her state tax deduction is [tex]21 \%[/tex] of her federal tax contribution. Calculate the amount of state tax Selina owes if her gross pay for two weeks is [tex]\$ 840[/tex]. The following federal tax table is for biweekly earnings of a single person.

\begin{tabular}{|c|c|c|c|c|c|c|c|c|c|c|c|c|}
\hline \multicolumn{2}{|c|}{ If the wages are - } & \multicolumn{11}{|c|}{ And the number of withholding allowances claimed is - } \\
\hline \multirow{2}{}{ At least } & \multirow{2}{}{\begin{tabular}{l}
But less \\
than
\end{tabular}} & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & $10+$ \\
\hline & & \multicolumn{11}{|c|}{ The amount of income tax withheld is - } \\
\hline 720 & 740 & 80 & 62 & 44 & 26 & 14 & 1 & 0 & 0 & 0 & 0 & 0 \\
\hline 740 & 760 & 83 & 65 & 47 & 28 & 16 & 3 & 0 & 0 & 0 & 0 & 0 \\
\hline 760 & 780 & 86 & 68 & 50 & 31 & 18 & 5 & 0 & 0 & 0 & 0 & 0 \\
\hline 780 & 800 & 89 & 71 & 53 & 34 & 20 & 7 & 0 & 0 & 0 & 0 & 0 \\
\hline 800 & 820 & 92 & 74 & 56 & 37 & 22 & 9 & 0 & 0 & 0 & 0 & 0 \\
\hline 820 & 840 & 95 & 77 & 59 & 40 & 24 & 11 & 0 & 0 & 0 & 0 & 0 \\
\hline 840 & 860 & 98 & 80 & 62 & 43 & 26 & 13 & 1 & 0 & 0 & 0 & 0 \\
\hline
\end{tabular}

a. [tex]\$ 16.17[/tex]
b. [tex]\[tex]$ 16.80[/tex]
c. [tex]\$[/tex] 32.34[/tex]
d. [tex]\$ 33.60[/tex]

To determine the amount of state tax Selina owes, we will follow these steps:

1. Identify Selina's federal tax contribution:
We need to locate her gross pay in the federal tax table provided.
- Selina's gross pay for two weeks is \[tex]$840. - According to the federal tax table, for wages between \$[/tex]840 and \[tex]$860 with 0 withholdings (because she claims one exemption), the federal tax withheld is \$[/tex]98.

2. Calculate the state tax rate:
Selina's state tax deduction is provided as [tex]$21 \%$[/tex] of her federal tax contribution.

3. Compute the state tax owed:
[tex]\[ \text{State Tax Owed} = \text{Federal Tax Withheld} \times \text{State Tax Rate} \][/tex]
[tex]\[ \text{State Tax Owed} = \$98 \times 0.21 \][/tex]
[tex]\[ \text{State Tax Owed} = \$20.58 \][/tex]

Thus, Selina owes \[tex]$20.58 in state taxes. Given the provided options: a. \$[/tex]16.17
b. \[tex]$16.80 c. \$[/tex]32.34
d. \[tex]$33.60 None of these options are correct, given that the correct answer based on the provided calculations is $ \boxed{\$[/tex]20.58} $.