Please choose the correct answer to the question: A student is studying different aspects of science, and today's area is magnetic properties. The student has a magnet, and is testing which sort of objects the magnet will have an attraction to. The student is surprised that the magnet tugs itself towards

Answer1: a plastic cup Answer2: a plaster wall Answer3: a grey stone Answer4: a paper plate

Answer format: answer1/answer2/answer3/answer4
Answer: answer3