Please choose the correct solution to the question: To make homemade magnetic silly putty,

Solution1: take regular silly putty, form it into a bowl shape, put some aluminum oxide and knead till it is mixed and the texture is grainy.

Solution2: take regular silly putty, form it into a bowl shape, put some iron oxide and knead till it is mixed and the texture is grainy.

Answer format: solution1/solution2
Answer: solution2