Answer: Option (b) is the correct answer.
Step-by-step explanation:
When an atom is able to attract electrons towards itself then this ability of readily accepting an electron is known as electronegativity.
For example, atomic number of oxygen is 8 and its electronic distribution is 2, 6. So, in order to completely fill its orbital in order to gain stability it readily accepts two electrons.
Thus, we can conclude that a measure of the ability to attract electrons in a chemical bond is electronegativity.