Read the following statements with regard to viscosity of a polymer solution: [P]: Specific viscosity of a polymer solution is obtained as relative viscosity + 1 [Q]: Relative viscosity is the ratio of the viscosity of the solution to the viscosity of pure solvent [R]: Kinematic viscosity is defined as the viscosity of the liquid at a definite temperature [S]: The unit for kinematic viscosity is poise or dyne sec cm'2 Indicate the correct combination of statements.