Answer
Ranked in order
1 - b
2 - c
3 - a
Step-by-step explanation
When the coupon rate is greater than the YTM, the bond's current price is greater than it's face value and the bond trade at a premium. Bond B is trading at a premium.
When the coupon rate is less than the YTM, the bond's current price is less than it's face value and the bond trade at a discount. Bond A is trading at a discount.
When the coupon rate is equal to the YTM, the bond's current price is equal to it's face value. Bond C has a current price equal to its face value.