"Future value of the spot price of bond A on the first delivery date - Future value of all coupons paid on bond A on the first delivery date" is $101-12. The actual futures price is $99-15. The eligible deliverable bonds consist of bonds A, B, C, D, E, F, G, H, I, J, K, L, M, N. Which of the following is correct?

a. A riskless arbitrage can be conducted by buying the futures contract and short-selling bond A

b. It is not possible to conduct a riskless arbitrage in this situation

c. A riskless arbitrage can be conducted by selling the futures contract and buying bond A