Please choose the correct solution to the question: How do you make buttermilk?

Solution1: Pour milk into a measuring cup. For every 1 cup of milk, stir in 1 tablespoon lime juice or vinegar.

Solution2: Pour milk into a measuring cup. For every 1 cup of milk, stir in 1 tablespoon lemon juice or vinegar.

Answer format: solution1/solution2
Answer: solution2