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NEET 2022 (Phase 1) · Logic Gates

Logic Gates question from NEET 2022 (Phase 1)

Q109NEET 2022 · PHASE 1Medium

Logic Gates

Figure

The truth table for the given logic circuit is

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Answer: (c)

  1. Upper NAND: A⋅B‾\overline{A \cdot B}. Lower NAND gets Aˉ\bar{A} and B: Aˉ⋅B‾\overline{\bar{A} \cdot B}.
  2. C=A⋅B‾⋅Aˉ⋅B‾C = \overline{A \cdot B} \cdot \overline{\bar{A} \cdot B}.
  3. AB=00AB = 00: 1⋅1=11 \cdot 1 = 1; 0101: 1⋅0=01 \cdot 0 = 0; 1010: 1⋅1=11 \cdot 1 = 1; 1111: 0⋅1=00 \cdot 1 = 0. So C=BˉC = \bar{B}.
  4. Table 1,0,1,01, 0, 1, 0, so the answer is (c).
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