How is the number of valence electrons related to the ionization energy of an element?

a) low ionization energy correlates to elements with fewer valence electrons
b) elements with higher ionization energy tend to have less valence electrons
c) atoms with nearly full valence electrons shells have lowers ionization energy
d) high ionization energy indicated a low likelihood to gain valence electrons

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.