If veca is any vector and hati,hatj and ...

If `veca` is any vector and `hati,hatj and hatk` are unit vectors along the x,y and z directions then `hatixx(vecaxxhati)+hatjxx(vecaxxhatj)+hatkxx(vecaxxveck)=` (A) `veca (B) `-veca` (C) `2veca` (D) `0

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