Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.
When solid zinc metal reacts with sulfuric acid to then it forms hydrogen gas and an aqueous solution of zinc (II) sulfate as a product.
This reaction is a single displacement reaction in which more reactive metal displaces least reaction metal from its solution.
The right answer for the question that is being asked and shown above is that: "B. observed wavelength of light" Planck's constant relates the Joules of energy absorbed/released by matter to the <span>B. observed wavelength of light</span>