Which one of the following fractions should be added to\[\frac{13}{18}\] such that the sum becomes\[\frac{5}{6}\]?

• A. \[\frac{1}{5}\]                          
• B. \[\frac{1}{6}\]            
• C. \[\frac{1}{9}\]              
• D. \[\frac{2}{3}\]
• E. None of these