Which are acid-base reactions according to Lewis theory but not according to the Brønsted-Lowry theory?

Question

Quizplus · Accepted Answer

According to the Lewis theory, any reaction that involves the transfer of a lone pair of electrons can be considered as an acid-base reaction. Brønsted-Lowry theory, on the other hand, defines an acid as a substance that donates a proton (H+), and a base as a substance that accepts a proton. 
Based on this, the following reactions are acid-base reactions according to Lewis theory but not according to Brønsted-Lowry theory:
I) HCl + :NH3 → NH4+Cl-
III) H2SO4 + H2O → H3O+ + HSO4-
IV) NH3 + BF3 → F3B-NH3
Therefore, the correct answer is C.

Which Are Acid-Base Reactions According to Lewis Theory but Not