Identify buffer solutions from the following list.
Choose all that apply.
a) 0.25 M hydroiodic acid + 0.24 M potassium iodide
b) 0.37 M sodium chloride + 0.29 M sodium nitrate
c) 0.11 M barium hydroxide + 0.29 M barium bromide
d) 0.11 M nitrous acid + 0.19 M sodium nitrite
e) 0.29 M ammonia + 0.34 M ammonium bromide