The velocity v of a particle at time t is given by v = at + ${b \over {t + c}}$, where a, b and c are constants. The dimensions of a, b and c are

Question

[L], [LT] and [LT^$-$2]

[LT^$-$2], [L] and [T]

[L²], [T] and [LT^$-$2]

[LT^$-$2], and [LT] and [L]

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