[ Family-Based Immigration Categories ]
Immediate Relative
Preference Categories

[ Immediate Relative ]
Spouse, children (unmarried and under 21 years of age), and pa-rents of U.S. citizen (no limitations on visa issuance)

[ Preference Categories ]
First Preference
Unmarried sons and daughters (over 21 years) of U.S. citizen.

Second Preference

a. Spouse and children (unmarried and under 21) of lawful permanent resident alien.

b. Unmarried sons or daughters (over 21) of lawful permanent resident alien.

Third Preference
Married sons or daughters (over 21 years of age) of U.S. citizen.

Fourth Preference
Brothers or sisters of adult United States citizen.