$ABC$ is an equilateral triangle. Length of each side is $a$ and centroid is point $O$. then $\overrightarrow{O A}+\overrightarrow{O B}+\overrightarrow{O C}=.......$

6-97

  • A

    $0$

  • B

    $1$

  • C

    $2$

  • D

    $3$

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