Choose the correct option for the following Assertion (A) and Reason (R).

Assertion

For two consecutive elements, the difference between the square roots of their Kα frequencies is approximately constant in the simple Moseley model.

Reason

In the simple screening approximation for the Kα series, Moseley's law can be written as √ν(Kα) = A(Z-1), where A is constant for that series.