Consider what you have learned about valuing bonds.

A: Coupon rate $=4\mathrm{.}5\%,$ YTM $=5\mathrm{.}2\%$

B: Coupon rate $=5\%,$ YTM $=4\mathrm{.}5\%$

C: Coupon rate $=3\mathrm{.}5\%,$ YTM $=3\mathrm{.}75\%$

D: Coupon rate $=4\%,$ YTM $=4\%$

Which of the bonds is selling at par?