Which of the following is a leasehold estate of indefinite duration?

A tenancy in common is not a leasehold estate but rather a form of co-ownership where two or more individuals hold an interest in a property. Each co-owner has an undivided interest in the property, but this arrangement does not pertain to the rental or leasing of property and does not represent an indefinite duration leasehold.

A tenancy with right of survivorship is a form of joint ownership where, upon the death of one owner, their interest automatically passes to the surviving owner(s). This is a co-ownership arrangement, not a leasehold estate, and thus does not involve indefinite tenancy terms typical of lease agreements.

A tenancy in the entirety is a special form of joint ownership available only to married couples, providing that both spouses must act together to sell or encumber the property. Like the previous options, this arrangement is a form of ownership rather than a leasehold estate and does not imply indefinite duration in terms of tenancy.