The sales ledger control account contained the following entries: 1. contra with the purchases ledger control account $\$500$, debit 2. discount allowed $\$600$, debit 3. irrecoverable debts written off $\$1200$, debit Which of these entries need correction?
- A1, 2 and 3
- B1 and 2 only
- C1 and 3 only
- D2 and 3 only