Answer is D
Step-by-step 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