A medical record is a documentation of a patient's medical history, including their diagnoses, treatments, medications, and test results. It is a comprehensive record that helps healthcare professionals provide appropriate care and make informed decisions. On the other hand, an invoice is a document that outlines the details of a transaction, including the products or services provided, their quantities, prices, and payment terms. While both documents are important in their respective fields, the question asks for the correct answer, which is "Medical record."