Step 1: Calculate the Number of Debentures Issued:
\[
\text{Debenture Issue Price} = \rupee 100 - 20\% \text{of} \rupee 100 = \rupee 80
\]
\[
\text{Balance Amount to be Paid} = \rupee 4,50,000 - \rupee 50,000 = \rupee 4,00,000
\]
\[
\text{Number of Debentures Issued} = \frac{\text{Balance Amount}}{\text{Issue Price}} = \frac{\rupee 4,00,000}{\rupee 80} = 5,000 \text{ debentures}
\]
Journal Entries:
\begin{center}
\begin{tabular}{|c|c|c|c|}
Date & Particulars & Debit (\rupee) & Credit (\rupee)
2023-03-31 & Plant and Machinery A/c & 4,50,000 &
& To Bank A/c & & 50,000
& To 6\% Debentures A/c & & 5,00,000
& To Discount on Issue of Debentures A/c & & 1,00,000
2023-03-31 & Discount on Issue of Debentures A/c & 1,00,000 &
& To Securities Premium A/c & & 1,00,000
\end{tabular}
\end{center}