Select all statements that are true about molecules. (there may be more than one correct answer, select all that apply)

a. very rare in nature
b. two or more atoms of one or more elements that are linked by shared electrons
c. pure substance
d. can be found in elements and compounds

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.