Assertion `:` In the equation of a plane progressive wave `y=rsin((2pi)/(T))[t-(x)/(upsilon)]`. Wavelength of wave is `lambda=upsilonT`.
Reason`:`Wavelength depends on time.
A. both, Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B. both, Assertion and Reason are true but Reason is not a correct explanation of the Assertion.
C. Assertion is true but the Reason is false.
D. both,Assertion and Reason are false.