(A) X¯¯¯¯−S and X¯¯¯¯+S
(B) X¯¯¯¯−2S and X¯¯¯¯+2S
(C) X¯¯¯¯−3S and X¯¯¯¯+3S
(D) None of these
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(A) X¯¯¯¯−S and X¯¯¯¯+S
(B) X¯¯¯¯−2S and X¯¯¯¯+2S
(C) X¯¯¯¯−3S and X¯¯¯¯+3S
(D) None of these