The correct answer is A. Rs. 25,000.
The rate of gross profit is 25% of the sales. This means that for every Rs. 100 of sales, the gross profit is Rs. 25. The cost of goods sold is Rs. 1,00,000. This means that the total cost of the goods sold is Rs. 1,00,000. To calculate the gross profit, we can use the following formula:
Gross profit = sales * rate of gross profit
Gross profit = 1,00,000 * 25/100
Gross profit = Rs. 25,000
Option B is incorrect because the gross profit is not equal to the cost of goods sold. Option C is incorrect because the gross profit is not equal to the sales. Option D is incorrect because the gross profit is not equal to 33.33% of the sales.