Which of the following Lewis acid-base reactions are not Bronsted acid-base reactions ?

Question

Which of the following Lewis acid-base reactions are not Bronsted acid-base reactions ?

a) Ag +(aq) + 2NH3(aq) = Ag(NH3)2 +(aq)

b) 2HCl(aq) + Ca(OH)2(aq) --> CaCl2(aq) + 2H2O(l)

c) Al(OH)3(s) + OH-(aq) --> Al(OH)4-(aq)

d) H2SO4(aq) + H2O(l) --> H3O+(aq) + HSO4-(aq)

Answer 1

Again (I've already answered an extremely similar question) look for reactions which do not involve proton transfer.

a and c qualify.