What Is the Mulliken Electronegativity of Sulfur That Has an Electron

Multiple Choice

What is the Mulliken electronegativity of sulfur that has an electron affinity value of −200.4 kJ/mol and an ionization energy value of 999.6 kJ/mol?

A) -100.2 kJ/mol
B) 499.8 kJ/mol
C) 799.2 kJ/mol
D) 600.0 kJ/mol
E) 120.0 kJ/mol