નીચેના સમીકરણમાં પ્રશ્નાર્થ ચિહ્ન $(?)$ ની જગ્યાએ શું આવશે?
$(23.1)^{2} + (48.6)^{2} - (39.8)^{2} = ? + 1147.69$

  • A
    $(13.6)^{2}$
  • B
    $\sqrt{12.8}$
  • C
    $163.84$
  • D
    $12.8$

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