I'll give you a question, please answer with step-by-step reasoning process.
Which of the following sentences is nonsensical?\nOptions:\n- Sentence A: "Air is very important to human beings."\n- Sentence B: "Air is not important to human beings."\n

Sentence B
Air is a requirement for human beings to live, and we'd all be dead without it.

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So, the answer is Sentence B