The correct option is (c) Group 15
To explain: The group 15 of periodic table is better known as the ‘pnicogens’. Pnicogen means ‘to choke’. Since all the elements in this group is choking in nature, including the choking property of nitrogen. Group 11 does not have a specific name; group 13 is referred to as the Boron group. Group 14 is known as the Carbon group.