If the Boolean expression \(\bar PQ+QR+PR\) is minimized, the expression becomes

1
\({\rm{\bar PQ}} + {\rm{QR}}\)
2
\({\rm{\bar PQ}} + {\rm{PR}}\)
3
\({\rm{QR}} + {\rm{PR}}\)
4
\({\rm{\bar PQ}} + {\rm{PR}} + {\rm{QR}}\)

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