The word 'slip' generally refers to a mistake or an unintended fall due to a lack of attention or coordination.
• Sentence I: The usage of the word "slip" is correct here. It refers to an unintended mistake or error during the presentation, which is contextually fitting.
• Sentence II: This is also correct. "slip" refers to the action of losing one's balance on a wet surface, which is the common meaning of the word in this context.
• Sentence III: In this case, "slip" is used incorrectly because it implies an unintended action, but the context suggests that the person is giving information on purpose. The correct word here would be "note" or "update".
Thus, the correct answer is option (d).