Principle of homogeneity of the equation used to check:

(a)Variable of the equation
(b) Constant of the equation
(c) Correctness of the equation
(d) Both variable and constant
See Answer

Answer:  Correctness of the equation

The principle of homogeneity of an equation states that in a physically meaningful equation, all terms must have the same dimensions. This principle is used to verify whether an equation is dimensionally correct by ensuring that the left-hand side and right-hand side have the same units.

Since this principle helps in checking the correctness of an equation, the correct answer is:

(d) Correctness of equation.