Step 1: Calculate total face value of debentures issued:
\[
30,000 \times ₹ 100 = ₹ 30,00,000
\]
Step 2: Discount on issue = 10% of face value
\[
10% \times 30,00,000 = ₹ 3,00,000
\]
Step 3: Total loss on issue of debentures = ₹ 4,50,000
This includes discount on issue + premium on redemption.
Step 4: Calculate premium on redemption:
\[
\text{Premium} = \text{Loss on issue} - \text{Discount on issue} = ₹ 4,50,000 - ₹ 3,00,000 = ₹ 1,50,000
\]