I need right choose

For a transmission medium, the bandwith is given as 8,46 MHz maximum capacity is achieved by using 7 bits. According to this information which answer is correct? O a. SNRdb = 45 Max Capacity = 127,00 Mbps O b. SNRdb = 42 Max Capacity = 116,90 Mbps O C. SNRdb = 42 Max Capacity = 118,44 Mbps O d. SNRdb = 34 Max Capacity = 96,70 Mbps O e. SNRdb = 37 Max Capacity = 105,10 Mbps