Which of the following is /are used as a mark/marks of punctuation?

Correct option is D

The correct answer is (d) All of these.
Explanation:
Punctuation marks are symbols used in writing to separate sentences and clarify meaning. The commonly used punctuation marks include:
· Full stop (.): Used to indicate the end of a sentence.
· Comma (,): Used to separate elements within a sentence for better readability.
· Colon (:): Used to introduce a list, explanation, or quotation.