GATE | GATE IT 2006 | Question 35

The boolean function for a combinational circuit with four inputs is represented by the following Karnaugh map.

Which of the product terms given below is an essential prime implicant of the function?
(C) PQ’S’
(D) Q’S’

Answer: (D)

Explanation: Essential prime implicants are prime implicants that cover an output of the function that no combination of other prime implicants is able to cover.

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