Mr. Crocker-Harris, the protagonist of the play "The Browning Version" by Terence Rattigan, stands out from other teachers in several ways. The correct answer to the given question is option 'A', as he is not biased. Let's explore why Mr. Crocker-Harris is different from other teachers in detail:

1. Unbiased Approach:
- Mr. Crocker-Harris is known for his unbiased approach towards his students. He treats each student fairly and without any favoritism. This is evident in the way he grades their work and interacts with them in the classroom.
- Unlike some other teachers who may show partiality towards certain students based on their academic performance or personal connections, Mr. Crocker-Harris maintains a strict sense of objectivity.

2. Strictness:
- While Mr. Crocker-Harris is strict, it is not the sole factor that sets him apart from other teachers. Many teachers can be strict in their approach, but it is the combination of his strictness with his unbiased nature that makes him unique.
- His strictness is not driven by a desire to assert authority or exert control over his students. Instead, it stems from his unwavering commitment to academic excellence and discipline.

3. Age:
- The age of Mr. Crocker-Harris is not the primary factor that distinguishes him from other teachers. While he is portrayed as an older teacher in the play, his age does not define his teaching style or demeanor.
- Mr. Crocker-Harris' uniqueness lies in his character traits and the way he interacts with his students, rather than his age. His experiences and personal struggles contribute to the depth of his character, making him stand out from his colleagues.

4. Rudeness:
- The option 'D' states that Mr. Crocker-Harris is different from other teachers because he is rude. However, this is not an accurate depiction of his character. While he may come across as stern or distant at times, his behavior is not rooted in rudeness.
- Mr. Crocker-Harris' reserved nature and emotional detachment are a result of his personal disappointments and disillusionment with life. He is not intentionally rude to his students or colleagues.

In conclusion, Mr. Crocker-Harris is different from other teachers primarily because of his unbiased approach towards his students. While he may also be strict and portrayed as an older teacher, his true uniqueness lies in his ability to treat each student fairly, without any bias or favoritism.

Ans is A