Which of the following is electrophile?

Nucleophiles: HS-,C2H5O-,CH33 N:,H2N¨-These species have unshared pair of electrons, which can be donated and shared with an electrophile.Electrophiles : BF3,Cl+,CH3-C+=O,NO2(Reactive sites have only six valence electrons; can accept electron pair from a nucleophile)