$A$ physical quantity $x$ is represented by the formula $x = M^a L^b T^c$. If $c \neq 0$,then:
- AThe dimension of $x$ can be expressed in terms of $M$ and $L$.
- BThe dimension of $x$ cannot be expressed in terms of $M$ and $L$.
- CThe dimension of $x$ can be expressed in terms of $M$ and $L$ only if $c=0$.
- DThe dimension of $x$ can never be expressed in terms of $M$ and $L$.
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