question_answer

If  \[\overrightarrow{a},\] \[\overrightarrow{b}\]and \[\overrightarrow{c}\]are unit coplanar vectors, then the scalar triple product \[[2\overrightarrow{a}-\overrightarrow{b},2\overrightarrow{b}-\overrightarrow{c},2\overrightarrow{c}-\overrightarrow{a}]=\]

A)  \[0\]    

B)  \[1\]

C)  \[-\sqrt{3}\]                  

D)  \[\sqrt{3}\]

E)  None of these