Nisha got 4 pastries from a bakery. She served 2 of them to the guest?s sand kept the remaining in the refrigerator. What fraction of pastries are kept in the refrigerator?

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