A. X¯¯¯¯−S and X¯¯¯¯+S
B. X¯¯¯¯−2S and X¯¯¯¯+2S
C. X¯¯¯¯−3S and X¯¯¯¯+3S
D. None of these
Correct Answer: X¯¯¯¯−S and X¯¯¯¯+S ✔
Last Updated: October 05, 2021
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