The four quantum numbers for the electron in the outer most orbital of potassium (atomic no. 19) are______
O n= 4, I=2, m=-1, s+1/2
O n= 4, I=0, m= 0, s=+1/2
O n= 3, I=1, m=1, s=+1/2
O n= 2, I=0, m=0, s=+1/2