An annuity that guarantees a given number of income payments, whether or not the annuitant is alive to receive them, is referred to as

While this term suggests a guarantee, it typically refers to annuities that provide payments for the lifetime of the annuitant, but do not ensure payments for a set term regardless of survival. Thus, it does not align with the definition of an annuity that guarantees payments for a specific period.

This term usually refers to annuities that provide benefits to a beneficiary after the annuitant's death, but it does not imply a guarantee of a fixed number of payments during the annuitant's life. Therefore, it does not accurately represent the characteristics of the annuity described in the question.

An irrevocable endowed annuity refers to a type of annuity that cannot be changed or canceled once established, but it does not guarantee a specific number of payments independent of the annuitant's survival. This definition diverges from the key feature of guaranteeing a fixed number of income payments.