A Treasury bond was bought and sold for $102.200 and $101.050 respectively. The accumulated value of all coupons was $18. If the bond was held for exactly four years and the bond paid coupons semi-annually, then the realised yield-to-maturity on this bond was:

A. 4% p.a

B. 3.85% p.a

C. 3% p.a

D. 2.55% p.a

E. 2% p.a