A R5 Land Bank bill , issued at 8,50 per cent discount for 91 days is sold 31 days before maturity in the secondary market at a new discount rate of 8,70 per cent. If the buyer keeps it until maturity his money market yield will be equal to:

8,56% p.a.

8,83% p.a.

8,89% p.a.

8,76% p.a.

None of the options