Shyamlal had \[\frac{5}{6}\] of a cake. He ate \[\frac{2}{3}\]of it. What part of the total cake did not he not eat?

• A.  \[\frac{4}{9}\]             
• B.  \[\frac{10}{12}\]
• C.  \[\frac{10}{6}\]                        
• D.  \[\frac{10}{3}\]