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The logical expresion $y=\mathrm{A}+\overline{\mathrm{A}} \mathrm{B} $  is equivalent to

  1. $y=\mathrm{AB}$
  2. $y=\overline{\mathrm{A}} \mathrm{B}$
  3. $y=\bar{A}+\mathrm{B}$
  4. $y=\mathrm{A}+\mathrm{B}$
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