The correct increase order of electronegativity isis(a) F>O>N> Be (b) Be>F >O>N (c) o >F >N>Be (d) N>Be>O> F

Dear Student,

Electronegativity increases as we move left to right across a period. This is because the effective nuclear charge increases as we move across a period, thus, tendency of atom to attract other electrons increases and thus electronegativity increases. 
Thus, correct answer is (a)