722. Unit of viscosity in CGS system is September 6, 2025 by Admin A. Gm .cm⁻¹ sec⁻¹ B. Gm . cm² . sec⁻² C. Gm .cm⁻², sec⁻¹ D. Gm . cm . sec⁻¹ ✅ The correct answer is option A.