Please choose the correct answer to the question: Which cannot be an example of crop rotation?

Answer1: planting tomatoes one year and alfalfa the next Answer2: planting zucchini one year and beans the next Answer3: planting bell peppers one year and hot peppers the next Answer4: planting corn one year and lelttuce the next

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