Which of the following is a defeasible fee estate with specific conditions?

A defeasible fee estate is a type of freehold estate that is subject to certain conditions or limitations. The fee simple condition subsequent is specifically characterized by the idea that the grantor retains the right to reclaim the property if a specified condition is violated. This means that while the grantee has ownership, that ownership comes with the condition that, if breached, the grantor can choose to take back the property.

In contrast, a fee simple absolute represents complete ownership with no conditions attached, and therefore does not qualify as a defeasible estate. The fee simple determinable is also a type of defeasible estate, but it automatically ends if the specified condition occurs, which is different from the fee simple condition subsequent where the grantor must take action to reclaim the property. The term "fee simple estate" is a general term that can refer to different forms of fee simple ownership, but does not specifically denote a defeasible condition. Hence, the correct identification of a defeasible fee estate with specific conditions aligns accurately with the fee simple condition subsequent.