For the Boolean function f (w, x, y, z) = Σ m (1, 3, 5,

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For the Boolean function f (w, x, y, z) = Σ m (1, 3, 5, 6, 7, 11, 14, 15)
minimal product is—

1. (w + y) (x + y + z) (w + x + z)
2. (w + x) (w + z) (x + y) (y + z)
3. (x + z) (w + y)
4. (x + z) (w + y)

Correct Option: C