From the balances given below for Polytech Inc., find the quick ratio.
\begin{tabular}{|l|r|}
\hline \multicolumn{1}{|c|}{ Items } & Amount (\$) \\
\hline Inventory & 20,000 \\
\hline Accounts receivables & 10,000 \\
\hline Cash in hand & 5,000 \\
\hline Cash at bank & 10,000 \\
\hline Prepayments & 5,000 \\
\hline Notes payable & 3,000 \\
\hline Interest payable & 2,000 \\
\hline
\end{tabular}
A. $6: 1$
B. $10: 1$
C. $1: 1$
D. $3: 1$