In these questions, the letters are linked in some way. Identify the relation and complete the last box. \[\text{345}\,\,\,\text{:}\,\,\,\,\text{567}\] \[\text{123}\,\,\,\text{:}\,\,\,\,\text{345}\] \[\text{567}\,\,\,\text{:}\,\,\,\,\text{?}\]

• A.  123                       
• B.         789       
• C.  456                       
• D.         345