Which one of the following is a correct definition O A perpetuity is an infinite stream of unequal payments An ordinary annuity is a finite stream of equal payments which occur at the end of each time period. O An annuity due is a finite stream of unequal payments which occur at the beginning of each time period. O An ordinary annuity is an infinite stream of equal payments which occur at the end of each time period. O A perpetuity is a series of equal payments which occur in even time intervals over a limited period of time