Assertion `(A) : K-` shell electron capture is detected by analyzing the wavelength of `X-` ray emitted.
Reason `(R):` The wavelength of the `X-` ray is characteristic of the daughter element and not the parent element.
A. If both `(A)` and `(R)` are correct , and `(R)` is the correct explanation of `(A)`
B. If both `(A)` and `(R)` are correct, but (R) is not the correct explanation of `(A)`
C. If `(A)` is correct, but `(R)` is incorrect.
D. If `(A)` is incorrect, but `(R)` is correct.