Consider the following data on some weak acids and weak bases:acid baseKa name formula Kb name formula6.8x10-4 hydrofluoric acid HF 1.8x10-5 ammonia NH34.9x10-10 hydrocyanic acid HCN 1.7x10-9 pyridine C5H5NUse this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on. solutiona) 0.1 M NaCN b) 0.1M NH4Brc) 0.1M KFd) 0.1M KBr