In which reaction does ${{\text{H}}_{\text{2}}}{\text{O}}$ act as a Lewis base but not as a Brønsted–Lowry base.

A.     ${{\text{H}}_2}{\text{O}} + {\text{NH}}_4^ +  \to {{\text{H}}_3}{{\text{O}}^ + } + {\text{N}}{{\text{H}}_3}$

B.     ${{\text{H}}_2}{\text{O}} + {\text{CaO}} \to {\text{C}}{{\text{a}}^{{\text{2}} + }} + {\text{2O}}{{\text{H}}^ - }$

C.     ${{\text{H}}_2}{\text{O}} + {{\text{[Fe(}}{{\text{H}}_2}{\text{O}}{{\text{)}}_6}{\text{]}}^{{\text{3}} + }} \to {\text{Fe[(OH)(}}{{\text{H}}_2}{\text{O}}{{\text{)}}_5}{{\text{]}}^{{\text{2}} + }} + {{\text{H}}_3}{{\text{O}}^ + }$

D.     ${\text{6}}{{\text{H}}_2}{\text{O}} + {{\text{[Ni(N}}{{\text{H}}_3}{{\text{)}}_6}{\text{]}}^{2 + }} \to {\text{6N}}{{\text{H}}_3} + {{\text{[Ni(}}{{\text{H}}_2}{\text{O}}{{\text{)}}_6}{\text{]}}^{2 + }}$

D