Which of the following quantities are dimensionally independent?

I. Dielectric constant II. Momentum III. Efficiency IV. Refractive index

A. I and II
B. II, III and IV
C. I, II, III and IV
D. I, III and IV

Correct Answer: Option D

D. I, III and IV

Explanation

The quantities Efficiency, Dielectric constant and Refractive index are dimensionless.