Which of the following pairs of physical quantities does not have same dimensional formula?

EXPLANATION:

1) Work = Force × Displacement = [MLT^-2] × [L] = [ML²T-2] 

Torque = Force × perpendicular distance = [MLT-2] × [L] = [ML2T-2] 

2) Angular momentum = mvr = [M] × [LT^-1] × [L] = [ML2T-1] 

We know, E = hν [E = energy, ν = frequency]

Plank's constant = E/ν = [ML2T-2]/[T^-1] = [ML2T-1] 

3) Tension = Force = [MLT-2]

surface tension = Force/length = [MLT-2]/[L] = [ML⁰T-2]

4) Impulse = Force × time interval = [MLT-2] × [T] =[MLT-1]

Momentum = mass × velocity = [M] × [LT^-1] = [MLT-1]

So, only in (c) both the dimensions are not matching.

So, the correct answer is option (3).