The correct answer is B. Payment.
A payment voucher is a document that authorizes the transfer of money from one account to another. It is used to record the details of the payment, such as the amount, the date, and the payee. Payment vouchers are typically used by businesses to track their expenses and to reconcile their bank statements.
A contra voucher is a document that is used to offset a previous voucher. It is typically used when there is an error in a previous voucher or when there is a need to adjust the amount of a payment.
A receipt is a document that is issued to the customer when they make a purchase. It is used to acknowledge the receipt of payment and to provide the customer with a record of the purchase.
A post-dated check is a check that is written on a date that is in the future. It is typically used when the person writing the check wants to ensure that the check will not be cashed until a certain date.
I hope this helps! Let me know if you have any other questions.