The Inventory account is used in each of the following except:

the entry to record goods purchased on account.

the return of goods purchased.

payment of freight on goods sold.

payment within the discount period.

Option D payment within the discount period

Explanation:

The reason is that the company is already reduced the inventory amount and this transaction requires to reduce the trade receivable account and increase in discount. The entry would be:

Dr Discount account (Expense) XX

Cr Trade Receivable Account XX

The cash received will be separately dealt, I mean the entry will be balancing charge to receivable account.

Dr Cash Account XX

Cr Trade Receivable Account XX