In chemical compound ability of an atom to attract shared electron toward itself is called electronegativity. Various scales are given to measure electronegativity like Pauling scale, Mulliken scale, Allred-Rochow's scale. Electronegatigity of an element also depends on various parameters.
If electron of an element is `6eV` and ionisation energy is `16.4eV` then electronegativity element on Pauling scale is:

Options

A. `2.5`
B. `3.5`
C. `4.0`
D. `3.0`