The sum of $6xy(2x - 4z) , 3yz(2x - 3z) and 4xz(3y - 2y^{2})$ is

The sum of $6xy(2x - 4z) , 3yz(2x - 3z) and 4xz(3y - 2y^{2})$ is
1). $12x^{2} y - 6xyz - 9yz^{2} + 8xy^{2}z$
2). $12x^{2} y - 6xyz + 9yz^{2} - 8xy^{2}z$
3). $12x^{2} y - 6xyz - 9yz^{2} - 8xy^{2}z$
4). $12x^{2} y + 6xyz - 9yz^{2} - 8xy^{2}z$

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