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Time (T), velocity (C) and angular momentum (h) are chosen as fundamental quantities instead of mass, length and time. In terms of these, the dimensions of mass would be :

$\begin{array}{1 1}(1)\; [M] = [T^{-1} C^{-2} h] \\ (2)\; [M] = [T^{-1} C^2 h] \\ (3)\; [M] = [T^{-1} C^{-2} h^{-1} ] \\ (4)\; [M] = [T C^{-2} h] \end{array} $

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