A vector is represented by \[3\,\hat{i}+\hat{j}+2\,\hat{k}\]. Its length in XY plane is [EAMCET (Engg.) 1994]

• A.             2     
• B.             \[\sqrt{14}\]
• C.                     \[\sqrt{10}\]                  
• D.             \[\sqrt{5}\]