Answer: Option (b) is the correct answer.
Explanation:
Since the given substance is [tex]SO_{3}[/tex], so we can see that there are three oxygen atoms and one sulphur atom.
Therefore, due to three oxygen atoms a prefix 'tri' will be added before the name of oxygen in the name of this given compound or substance.
So, name of cation will be written first and then name of anion will be written.
Therefore, name of [tex]SO_{3}[/tex] is sulfur trioxide.
