Which punctuation would be used to separate the adjectives in following sentence The letter described student as dedicated diligent and punctual?

The correct punctuation to separate the adjectives in the sentence "The letter described the student as dedicated, diligent, and punctual" is a comma.

Here's why:

* Multiple adjectives describing the same noun: The words "dedicated," "diligent," and "punctual" all describe the noun "student."

* Coordinate adjectives: When multiple adjectives modify a noun equally and could be reversed without changing the meaning, they are called coordinate adjectives. They are separated by commas.

Corrected sentence: The letter described the student as dedicated, diligent, and punctual.