$\left[ML^2 T^{-2} K^{-1}\right]$ is the dimensional formula of which physical quantity?

Dimensions of the coefficient of viscosity are

The quantities $A$ and $B$ are related by the relation $m = A/B$,where $m$ is the linear density and $A$ is the force. The dimensions of $B$ are of

Let the inductance and resistance be denoted by $L$ and $R$ respectively. The dimensions of $\left(\frac{L}{R}\right)$ are

$Assertion$ : The dimensional formula for relative velocity is the same as that of the change in velocity.
$Reason$ : Relative velocity of $P$ with respect to $Q$ is the ratio of the velocity of $P$ and that of $Q$.

Dimensional formula for torque is