In these questions, the letters are linked in some way. Identify the relation and complete the last box. \[\text{B2B}\,\,\,\text{:}\,\,\,\,\text{D4D}\] \[\text{C3C}\,\,\,\text{:}\,\,\,\,\text{E5E}\] \[\text{D4D}\,\,\,\text{:}\,\,\,\,\text{?}\]

• A. F6F                                        
• B.  E6E       
• C.  G6G     
• D.         G7G