Which of the following set of quantum numbers is correct for the 19^"th" electron of chromium

Which of the following set of quantum numbers is correct for the 19^"t

1.	Which of the following set of quantum numbers is correct for the 19^"th" electron of chromium
Answer» `{:(N,L,m,s),(3,0,0,1//2):}` `{:(n,l,m,s),(3,2,-2,1//2):}` `{:(n,l,m,s),(4,0,0,1//2):}` `{:(n,l,m,s),(4,1,-1,1//2):}` Solution :`19^"th"` electron of chromium is `4s^1` n=4, l=0, m=0 , `s=+1/2`