Explanation

• If a teacher has to prove his credibility in the evaluation of answer booklets, then he should be impartial.
• Being impartial ensures that the evaluation process is fair, unbiased, and based solely on the merit of the students' responses, rather than personal biases or preferences.
• This contributes to the integrity and credibility of the assessment process, fostering trust and confidence in the teacher's judgment and the educational system as a whole.