The correct statement is: Electronegativity increases from left to right within a row of the periodic table.
This trend occurs because as you move across a period, the number of protons in the nucleus increases, which attracts the bonding electrons more strongly, resulting in higher electronegativity values. Additionally, electronegativity generally decreases as you move down a column in the periodic table due to the increasing distance between the nucleus and the outermost electrons, as well as increased electron shielding.