Which is incorrect about nucleophilic substitution reactions

Options

A. `{:(SN^(1),,SN^(2)),("Favours polar protic solvent",,"Favours polar aprotic solvents"):}`
B. `{:(SN^(1),,SN^(2)),(3^(@) gt 2^(@) gt 1^(@) gt CH_(3)-X("order of reactivity"),,CH_(3)X gt 1^(@) gt 2^(@) gt 3^(@)("order of reactivity")):}`
C. `{:(SN^(1),,SN^(2)),("Two steps",,"One steps"):}`
D. `{:(SN^(1),,SN^(2)),("Inversion of configuration",,"Recemisation with some inversion"):}`