[" Which of the following electronic "],[" configurations in the outermost shell is "],[" characterstic of alkali metals? "],[[" (A) "(n-1)s^(2)p^(6)ns^(2)np^(1)],[" (B) "(n-1)s^(2)p^(6)d^(10)ns^(1)],[" (C) ",(n-1)s^(2)p^(6)ns^(1)],[" (D) ",(n-1)d^(10)ns^(2)np^(6)]]