In the equation `S_(n)=u+(a)/(2)(2n-1)` the dimensions of `S_(n)` are

Options

A. `[M° L^(1) T°]`
B. `[M° L^(1) T^(-1)]`
C. `[M^(1) L^(0) T^(-1)]`
D. `[M^(0) L^(1) T^(-2)]`

Answer

B