I beg to differ on answers to two of the objectives. Qn VI : I believe the answer is 'c', the debit note: As it can be use by a buyer in returning goods to request for a credit note and/or to inform the supplier of a reduction in the amount owing to them due to the goods returned Qn XIX: Your selected answer 'b'... You kept emphasizing without reservations whilst it says with reservation. So the fact that there's a reservation, I would go with 'c'