question_answer

Which one among the following is not a pair of like terms?

A) \[-\text{ }13xy{{z}^{2}},\text{ }6{{z}^{2}}xy\]

B)  \[3{{x}^{2}}y{{z}^{2}}\text{, -3y}{{\text{x}}^{\text{2}}}{{\text{z}}^{\text{2}}}\]

C)  \[7{{x}^{3}}y{{z}^{2}},3x{{z}^{2}}{{y}^{3}}\]

D)  \[9x{{y}^{3}}{{z}^{2}},\,\,2{{z}^{2}}x{{y}^{3}}\]

E)             None of these