If B is the only child of A M and N are the children of B. D is the grandmother of N. How is A related to D?

Options
1) Grandmother
2) Husband
3) Mother
4) Son

• A,D->B->M,N
  A is the husband of D
  
• 8 years agoHelpfull: Yes(3) No(0)
• A (grandfather to M and N) ....... D (grandmother to M and N)
  |
  B
  |
  M and N (childrens)
  so A is the husband of D
• 8 years agoHelpfull: Yes(1) No(0)
• A (grandfather to M and N) ....... D (grandmother to M and N)
  |
  B
  |
  M and N (childrens)
  so A is the husband of D
• 8 years agoHelpfull: Yes(1) No(0)
• A (grandfather to M and N) ....... D (grandmother to M and N)
  |
  B
  |
  M and N (childrens)
  so A is the husband of D
• 8 years agoHelpfull: Yes(1) No(0)
• grand mother bcozz m n are childrens of b and b is child of a .so that yyy
• 8 years agoHelpfull: Yes(0) No(4)