Given the stream of consciousness rationale, provide a reasonable question and answer. Rationale: Water is ineffective at removing carbon pencil marks.
 The question and answer:
user
Which of the following sentences is nonsensical?
Options:
- Sentence A: "Water is used to rub out something written by carbon pencil"
- Sentence B: "Eraser is used to rub out something written by carbon pencil"

The answer is Sentence A
assistant