Context: If I buy the lowest price Drano does that somehow mean that my drain wo n't be clogged ? Apparently yes . I poured the whole thing down the drain and let it work for an hour like the bottle told me to do . Then I flushed it with hot tap water .

Question: How many bottles of Drano did I have to use to unclog my drain ?
Options:
0. I only used hot water and a stick to unclog the drain .
1. None of the above choices .
2. I only used half a bottle of Drano to unclog the drain .
3. I used two whole bottles of Drano to unclog the drain .
Answer: 1