A boat is moving with a velocity \[3\text{ }\hat{i}+4\text{ \hat{j}}\] with respect to ground. The water in the river is moving with a velocity \[-3\text{ }\hat{i}-4\text{ \hat{j}}\] with respect to ground. The relative velocity of the boat with respect to water is

• A. \[8\hat{j}\]        
• B.                    \[-6\hat{i}-8\hat{j}\]
• C. \[6\hat{i}+8\hat{j}\]     
• D.        \[5\sqrt{2}\]