A beneficiary has presented a full set of documents under a credit provided for deferred payment at 180 days after B/L date to the nominated bank, it examined documents which were complied with the terms and conditions of the credit, it incurred a deferred payment undertaking and at the request of beneficiary, it has discounted and prepaid net amount to the beneficiary, then it sent a full set of documents by courier to the issuing bank for reimbursement at maturity. After some days nominated bank discovered that beneficiary has escaped for his delivery of a part of forgery documents.

  A. On the maturity date in accordance with UCP 500 Article 9ii and Article 15, issuing bank ______ to the nominated bank.

  B. On the maturity date in accordance with UCP 600 Article 7aIII, 7c and Article 12b, the issuing bank ______ to the nominated bank, because UCP 600 Article 7c stipulates: "An issuing bank's undertaking to reimburse a nominated bank is independent of the issuing bank's undertaking to the beneficiary. "