Select the statement that best describes the following compound: Ba(OH)₂
1) A ternary compound that is a base, ionic, and comprised of a monovalent element
2) A ternary compound that is an acid, covalent, and comprised of a multivalent element
3) A binary compound that is a base comprised only of non-metal elements
4) A ternary compound that is a base, covalent, and comprised of a monovalent element