Which of the following symbols represents an interrogation point?

The symbol that represents an interrogation point is indeed the question mark, which is commonly denoted as "?". It is utilized in writing to indicate that a sentence is a question, prompting the reader to consider what is being asked. In various languages and contexts, the question mark serves to signal that the information presented seeks a response, prompting curiosity or inquiry.

The other symbols listed have different functions and do not convey the same meaning as a question mark. The semicolon is used to connect closely related ideas, the colon introduces lists or explanations, and the comma indicates a brief pause or separates elements within a sentence. Thus, the question mark is uniquely suited to denote an interrogative sentence, providing clarity about the nature of the inquiry being made.