The area of the parallelogram whose sides are represented by the vectors \[\hat{j}+3\hat{k}\] and \[\hat{i}+2\hat{j}-\hat{k}\] is

• A.                 \[\sqrt{61}\]sq. unit
• B.                             \[\sqrt{59}\]sq. unit
• C.                 \[\sqrt{49}\]sq. unit       
• D.                 \[\sqrt{52}\]sq. unit