The correct answer is: B. Rs. 14,100
The formula for calculating the debtors’ opening balance is:
Debtors’ opening balance = Debtors’ closing balance + Sales made to customers – Cash received from customers
In this case, the debtors’ opening balance is:
Debtors’ opening balance = Rs. 12,000 + Rs. 21,500 – Rs. 23,600 = Rs. 14,100
Option A is incorrect because it is the total sales made to customers during the year.
Option C is incorrect because it is the cash received from customers during the year.
Option D is incorrect because it is the difference between the debtors’ closing balance and the sales made to customers during the year.