Final answer:
A perpetuity is an indefinitely continuing annuity, and the correct example of a perpetuity is preferred stock dividend. Mortgages, savings account deposits, and loans do not qualify as perpetuities because they have a finite end point.
Step-by-step explanation:
An example of a perpetuity is preferred stock dividend. A perpetuity is a type of annuity that continues indefinitely. Preferred stock dividends are fixed payments made to stockholders that can, in theory, go on forever as long as the issuing company exists. While we could consider interest payments on a mortgage and deposits into a savings account as forms of return, they do not represent perpetuities because they are not indefinite—the mortgage will eventually be paid off, and the savings will be used for a purchase. In contrast, a preferred stock is designed to pay dividends continuously, which makes this the correct answer.