Dimensional Analysis

Torque is expressed as,
force perpendicular distance
So,

Now, the dimension of moment of force force distance

(b) Dimension of pressure Force

(c) Dimension of acceleration
(d) Dimension of impulse [Force] [time]

As, the torque has dimension
which is correctly matched by the dimensions of moment of force.
So, option (a) is correct.

Step 1: Write dimensional formula of inductance.
Inductance is defined using the relation Thus, Since
Step 2: Write dimensional formula of resistance.
Resistance is given by
Step 3: Find dimensions of .

Step 4: Conclusion.
The dimensional formula of is .