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If x = <a href="https://www.codecogs.com/eqnedit.php?latex=\inline&space;y^{a}" target="_blank"><img src="https://latex.codecogs.com/gif.latex?\inline&space;y^{a}" title="y^{a}" /></a>, y = <a href="https://www.codecogs.com/eqnedit.php?latex=\inline&space;z^{b}" target="_blank"><img src="https://latex.codecogs.com/gif.latex?\inline&space;z^{b}" title="z^{b}" /></a> and ্ z= <a href="https://www.codecogs.com/eqnedit.php?latex=\inline&space;x^{c}" target="_blank"><img src="https://latex.codecogs.com/gif.latex?\inline&space;x^{c}" title="x^{c}" /></a>, then the value of abc is _______

1. A 1
2. B 2
3. C 3
4. D 4