Lithium has lowest electronegativity value.
The propensity of an atom of a certain chemical element to draw sharing electrons while forming a chemical bond was known as electronegativity and was denoted by the symbol. The atomic number and the separation of the valence electrons from the charged nucleus have an impact on an atom's electronegativity.
It is known that on moving toward the period in the periodic table electronegativity rapidly increases and decreases toward the group. So, lithium will have least electronegativity value than beryllium, boron, carbon, and nitrogen
Therefore, Lithium has lowest electronegativity value.
Hence, the correct answer will be option (a).
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