Topic: Pronoun (সর্বনাম),

Best Answer Explained in Below-:

The question presents a relative clause that provides additional information about the noun "Nobel prize." In this context, the correct choice is "which" because it introduces a non-defining relative clause. Non-defining clauses add supplementary information to a sentence without altering its fundamental meaning. They are often set apart by commas.

On the other hand, "that" is typically used with defining relative clauses, which are essential to the sentence’s meaning and do not take commas. If we replaced "which" with "that" in the sentence, it would imply that the Nobel prize could only be described by the fields of work mentioned, which is not the intended meaning.

The use of "which" here smoothly connects the Nobel prize to the idea of it being the highest honor, while the preposition "in" emphasizes the specific fields where this honor can be attained. Therefore, using "which" allows for a clearer, more accurate expression of the idea that the Nobel prize is celebrated across various fields, maintaining the informative quality without restricting the scope of the statement.