The correct answer is A.
The word “vindictive” means “having or showing a desire for revenge.” It is derived from the Latin word “vindicta,” which means “punishment.” A vindictive person is often quick to anger and holds grudges. They may seek revenge on those who have wronged them, even if the wrong is minor.
The other options are incorrect because they do not describe a vindictive person. A forgetful person is someone who has difficulty remembering things. A forgiving person is someone who is willing to let go of anger and resentment. An obedient person is someone who follows orders or rules. A timid person is someone who is shy or fearful.
In the context of the question, the speaker’s friends are commenting on his vindictive nature. This suggests that the speaker is quick to anger and holds grudges. He may seek revenge on those who have wronged him, even if the wrong is minor. This is consistent with the definition of the word “vindictive.”