Let's think step by step! Of the following two sentences, which one is against common sense?
Options:
- Sentence A: "Nail is a small piece of metal which is inserted into a lock and turned to open or close it"
- Sentence B: "Key is a small piece of metal which is inserted into a lock and turned to open or close it"
Nail's main use is to anchor any object to another. The answer: Sentence A.