Electrophiles

Chemistry Level 2

Which of the following pairs represents a set of electrophiles?

(a) \(\ce{Br+}\) and \( \mathbf{\colon}\ce{CCl2}\)
(b) \(\ce{H+}\) and \(\ce{H2O}\)
(c) \(\ce{BF3}\) and \(\ce{NH3}\)
(d) \(\ce{H-}\) and \(\ce{AlCl3}\)