Bank Guarantees and Letters of Credit

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1.
Which of the following parties is responsible for advising a Letter of Credit to the beneficiary?
2.
Which type of Letter of Credit can be amended or revoked by the issuing bank at any time without prior notice to the beneficiary?
3.
What is a Back-to-Back Letter of Credit primarily used for?
4.
Which clause in a Letter of Credit allows the beneficiary to avail an advance before shipment of goods?
5.
Which type of Letter of Credit allows the original beneficiary to transfer part or all of the credit to another party?