Question $6$ of $15.$

To which pair of taxpayers do the rules for children of divorced, separated, or unmarried parents apply?

A father $($$$6,149$AGI$)$ and his girlfriend $($$$40,643$AGI$)$ who have never married but who have lived together for three years. The qualifying child

who lives in the household is the child of only the father.

A father and mother who are still married, but who have not lived together for the last six months of the year, whose child is the custodial parent's

qualifying child.

A grandmother and grandfather who are divorced, whose grandchild is the custodial grandparent's qualifying child.

A father and mother who have never married and have not lived together for the last six months of the year, whose child is their qualifying relative,

not a qualifying child.