Please choose the correct solution to the question: How to sterilize baby bottles.

Solution1: Place clean bottles and parts in large pan on stove burner, cover with water, allow to soak for at least 5 minutes.

Solution2: Place clean bottles and parts in large pan on stove burner, cover with water, bring to boil and boil rapidly for at least 5 minutes.

Answer format: solution1/solution2
Answer: solution2