The rate of `SN^2` reaction depends on the effectiveness of the nucleophile in ejecting the leaving group. Nucleophilicity is the affinity for `C` atom, while basicity is the affinity for proton.

In both cases, a new bond is formed. If a new bond is formed between the anion and proton, the specied acts as a base. If a new bond is formed between the anion and `C` atom, the species acts as nucleophile.
Which of the following is wrong ?

Options

A. The decreasing basic order of the following is :
`NH_3 gt PH_3 gt AsH_3 gt SbH_3`
B. The decreasing basic order of the following is :
`CH_3^(Ө) gt overset (Ө) NH_2 gt overset (Ө) OH gt F^(Ө)`.
C. The decreasing nucleophilic order of the following is :
`overset (Ө)CH_3 lt overset (Ө)NH_2 lt overset (Ө) OH lt F^(Ө)`.
D. The decreasing basic and nucleophilic order of the following is :
`overset (Ө) CH_3 gt H^(Ө) gt overset (Ө) O H gt overset (Ө) O Me gt overset (Ө) CN`.

Answer

C