Hint: Pompous is used to refer to a boastful person who considers himself to be self-important and proud.Complete step-by-step answer: The word pompous has been derived from the Old French word- Pompeux, which means full of grandeur. With the help of the hint, we know the meaning and origin of the word- Pompous, let’s look at its usage:Example- She is a pompous woman who is always talking about herself. Here, we can understand that ‘X’ is a proud and boastful person.Now, let’s look at the given options to find the opposite or the antonym of Pompous-a)Feeble- It refers to a fearful or a faint-hearted person. It has a completely different meaning from pompous. Hence, it is an incorrect option.b)Normal- It refers to something or someone who is considered to be ordinary or common. It has a completely different meaning from pompous. Hence, it is an incorrect option.c)Humble- It refers to a submissive person who has a low self-focus. It is the opposite of pompous. Hence, it is the correct option.d)Mild- It refers to a gentle and soft-hearted person. It has a different meaning from pompous. Hence, it is an incorrect option.Note: Use the elimination method to logically remove the word that is least likely to be the opposite of pompous.