Explanation:

- Prejudice refers to a preconceived opinion or judgment, often based on limited information or stereotypes, and typically leading to unfair or biased attitudes or treatment.

- Option 1: Imposing

- Means having a grand or impressive appearance.

- It does not relate to having pre-formed ideas or biases.

- Option 2: Unpretentious

- Means modest or not attempting to impress others.

- It is unrelated to the concept of bias or pre-formed opinions.

- Option 3: Boring

- Describes something that is dull or uninteresting.

- This does not capture the notion of bias or pre-judgment.

- Option 4: Preconception

- Means an opinion formed beforehand without adequate evidence.

- This is closely related to prejudice as both involve forming opinions without full knowledge.