4. Identify the most simple SOP expression from the K-map shown.

  1. A' + B'
  2. C' + D'
  3. A' + AB'
  4. A'C' + A'C + AB'
  5. A'B + C









4 is WRONG. This expression can be simplified still further. Hint: there is a more efficient way of grouping the 1-entries in the K-map.

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