Match the following
\[
\begin{array}{|c|l|c|l|}
\hline
& List-I & & List-II
\hline
A & \text{Batch} & I & \text{Steady-state operation}
B & \text{Fed-batch} & II & \text{Substrate feeding without outflow}
C & \text{Continuous} & III & \text{No input or output}
D & \text{Chemostat} & IV & \text{Constant dilution rate}
\hline
\end{array}
\]
The correct matching is