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).
Final Answer: \[\boxed{\text{Goodwill = Rs. 80,000}} \]