Rani read\[\frac{2}{5}\]of a book on the 1st day and \[\frac{1}{5}\] of it on the 2nd day. What fraction of it is not read?

• A.  \[\frac{1}{4}\]                                  
• B.  \[\frac{3}{5}\]
• C.  \[\frac{2}{5}\]                                  
• D.   \[\frac{4}{5}\]