d
(d) By substituting the dimensions of mass \([M]\), length \([L] \) and coefficient of rigidity \(\left[ {M{L^{ - 1}}{T^{ - 2}}} \right]\) we get \(T = 2\pi \sqrt {\frac{M}{{\eta L}}} \) is the right formula for time period of oscillations

\((a, b, c)\) Reynolds number and coefficient of friction are dimensionless.

Latent heat and gravitational potential both have dimension \([{L^2}{T^{ - 2}}]\).

Curie and frequency of a light wave both have dimension \([{T^{ - 1}}]\).

But dimensions of Planck's constant is \([M{L^2}{T^{ - 1}}]\) and torque is \(\left[ {M{L^2}{T^{ - 2}}} \right]\)