Under the rule against perpetuities, a suspension of the absolute power of alienation is void if it lasts longer than:

• A. Lives in being at the creation of the estate plus 21 years
• B. 50 years
• C. 100 years
• D. Nine months after creation

Answer: (A)

The main idea here is the rule against perpetuities: any interest that suspends alienation must vest or fail within the lifetime of someone alive at the creation of the interest (a measuring life) plus 21 years. In other words, the allowed window for vesting is the life in being at creation plus 21 years after those lives die.

So the period that’s permitted ends at the death of the last measuring life plus 21 years. That’s why the statement describing the maximum duration as life in being at creation plus 21 years is the correct one. It directly matches the basic RAP measuring-life framework.

The other options aren’t correct because they propose fixed calendar durations not tied to measuring lives, or a period that’s not aligned with the RAP window. For example, a flat 50-year or 100-year horizon isn’t the standard RAP limit unless that horizon is nonetheless constrained by the lives in being plus 21 years. A short period like nine months after creation doesn’t reflect the required lifetime-plus-21-years measure.