Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : The wavelength of radiation is displaced as temperature changes, but the product of wavelength and temperature remains constant.
Reason (R) : Wien's Law is a special case of Planck's radiation law in the region of longer wavelength.
In the light of the above statements, choose the most appropriate answer from the options given below :