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A programmable logic array (PLA) is shown in the figure.

 

The Boolean function $F$ implemented is

  1. $\overline{P} \: \overline{Q}R+ \overline{P}QR+P \overline{Q}  \:  \overline{R}$
  2. $(\overline{P}+\overline{Q}+R)(\overline{P}+Q+R)(P+\overline{Q}+\overline{R})$
  3. $\overline{P} \: \overline{Q}R+\overline{P}QR+P \overline{Q}R$
  4. $(\overline{P}+\overline{Q}+R)(\overline{P}+Q+R)(P+\overline{Q}+R)$
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