The `residuary powers` are powers that are not mentioned or assigned to any level of government in India. These powers are not included in the Union List, the State List, or the Concurrent List, which are lists that specify the subjects and areas of legislative authority of the central government, state governments, and both levels of government, respectively.

Option 1 is incorrect because powers enumerated in the State List are specific powers assigned to the state governments, not residuary powers.

Option 2 is incorrect because powers included in the Union List are powers assigned to the central government, not residuary powers.

Option 3 is incorrect because powers enumerated in the Concurrent List are shared powers between the central and state government, not residuary powers.

Therefore, the correct answer is option 4, which states that residuary powers are those that are not mentioned in any of the lists.