WHICH OF THE FOLLOWING OF THE METHOD OF PAYMENT IS NOT POSSIBLE

7. Which of the following of the method of payment is NOT possible?

a. 100% of the contract price by letter of credit

b. 20% prepayment and 80% by letter of credit

c. 90% by letter of credit and 10% retaining until the warranty period is over

d. Part of the contract price is paid by letter of credit but there is not clear

figure stated in the amount of the credit.