The correct option is B Destroy
1.Annihilate means to destroy, eliminate, erase completely. Option B is correct. E.g. The atom bomb explosions during second word war annihilated Hiroshima and Nagasaki.
2.Forward is used to present front direction or to make progress.
E.g. General ordered the army to march forward.
The treaty between India and Pakistan is a big step forward and would bring peace in Kashmir. 3)Testify means to present evidence as a witness. It is more of a legal term. 4)Entertain means to amuse /enjoy or consider somebody.
e.g. The joker entertained the audience.
e.g. Teacher informed the students that she would not entertain any assignment after Saturday.