Increases from left to right; decreases from bottom to top of the following is a general trend for the electronegativity of elements in the periodic table. The correct option is B.
The ability of an atom to draw protons (or electronic structure) to itself is measured by its electronegativity. It controls the distribution of the shared electrons among the two atoms inside a bond. The bigger an atom's electronegativity, the more aggressively it will draw electrons from its bonds.
The number of neutrons and the separation of the valence electrons from charged nucleus have an impact on an atom's electron affinity. An isotope or a substituent grouping will draw electrons in greater amounts the higher their associated responsible for the condition.
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