If x+y+z = 0 , then what is the value of $\frac{x^{2}}{3z}+\frac{y^{2}}{3xz}+\frac{z^{2}}{3x}$

If x+y+z = 0 , then what is the value of $\frac{x^{2}}{3z}+\frac{y^{2}}{3xz}+\frac{z^{2}}{3x}$
1). 0
2). xz
3). y
4). 3y

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