If force \[(\overrightarrow{F})=4\hat{i}+5\hat{j}\]and displacement \[(\overrightarrow{s})=3\hat{i}+6\hat{k}\] then the work done is [Manipal 1995]

• A.                 \[4\times 3\]     
• B.                 \[5\times 6\]
• C.                 \[6\times 3\]     
• D.                 \[4\times 6\]