What is a pur autre vie life estate?

a. It endures over the lifetime of the owner, then passes toan heir
b. It ends with the death of the life estate owner and may pass back to the original owners or their heirs or to a named third party
c. It ends with the death of the original grantor, then passes to a third party
d. It endures over the lifetime of a third person, after which the property passes from the tenant holder to the original grantor

Answer is D

Explanation:

A pur autre vie life estate is actually an estate in land given by an original grantor to a tenant holder, but of which a third party's lifetime (from moment of issuance) is used as the duration of ownership of the estate by the tenant holder. This means if the third party should die, the ownership of the estate in land is reverted back to the original grantor (or another who is willed so by the original grantor) from the tenant holder

For example, a pur autre vie is when A grants B ownership of land estate over the duration of the lifetime of third party C, but when C dies, ownership of life estate is reverted back from B to the original grantor A