Multiple choice

What is the minimal form of the Karnaugh map shown below? Assume that X denotes a don't care term.

  1. $\bar{b} \bar{d}$
  2. $ \bar { b } \bar { d } + \bar{b} \bar{c} $
  3. $ \bar{b} \bar{d} + {a} \bar{b} \bar{c} {d}$
  4. $ \bar{b} \bar{d} + \bar{b} \bar{c} + \bar{c} \bar{d} $
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B Correct answer
Explanation

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