Step 1: Calculate Capitalised Value of Average Profits
\[
\text{Capitalised Value} = \frac{\text{Average Profits} \times 100}{\text{Normal Rate of Return}}
\]
\[
= \frac{1,00,000 \times 100}{25} = 4,00,000
\]
Step 2: Calculate Goodwill
\[
\text{Goodwill} = \text{Capitalised Value} - \text{Net Assets}
\]
\[
= 4,00,000 - 3,20,000 = 80,000
\]
Step 3: Verify with options
Goodwill = Rs. 80,000 (matches option 1, correction here).
Final Answer: \[ \boxed{\text{Goodwill = Rs. 80,000}} \]