已知HF的酸性比HCN的酸性强，现有物质的量浓度和体积相同的NaF和NaCN两种溶液，已知NaF溶液中离子数目为n_l，NaCN溶液中离子数目为n₂，下列关系式中正确的是

1. A.
   n_l＝n₂
2. B.
   n_l＞n₂
3. C.
   n_l＜n₂
4. D.
   c(F^-)＜c(CN^-)

 A.n₁=n₂                                                B.n₁＞n₂                                                              C.n₁＜n₂                                               D.c(F^－)＞c(CN^－)

A.N₁=N₂                            B.N₁＞N₂

C. N₁＜ N₂                         D.c(F^-)＞c(CN^-)