question_answer

\[{{K}_{\alpha }}\]characteristic X-ray refers to the transition  [MP PMT 1999]

A)            \[n=2\] to \[n=1\]              

B)            \[n=3\] to \[n=2\]

C)            \[n=3\] to \[n=1\]              

D)            \[n=4\] to \[n=2\]