Time (T), velocity (C) and angular momentum (h) are choosen as fundamental quantities instead of mass, length and time. In term of these, dimension of mass would be : (1) [M] = [T-IC-2h] (2) [M] = [T-IC?h] !! (3) [M] = [T-'C-2h-] (4) [M] = [T-C-2h]