Molecular weight of an organic compound is 100. Molecular weight of its homologue would be

Homologues differ in their molecular weight by 14n (n = 1,2,3,4…) ;Given molecular weight is 100 ;Difference in MW between 100 and option (1)---44option (2)---28option (3)---68option (4)---16‘28’ is a multiple of ‘14’