A Boolean function ƒA, B, C, D) = π(1, 5, 12, 15)

A Boolean function ƒA, B, C, D) = π(1, 5, 12, 15) is to be implemented using an 8 × 1 multiplexer (A is MSB). The inputs ABC are connected to the select inputs S₂S₁S₀ of the multiplexer respectively.

Which one of the following options gives the correct inputs to pins 0, 1, 2, 3, 4, 5, 6, 7 in order?

1. D, 0, D, 0, 0, 0, D, D
2. D, 1, D, 1, 1, 1, D, D
3. D, 1, D, 1, 1, 1, D, D
4. D, 0, D, 0, 0, 0, D, D

Given maxterm ƒ (A, B, C, D) = π(1, 5, 12, 15)
∴ So minterm
ƒ(A, B, C, D) = ∑m(0, 2, 3, 4, 6, 7, 8, 9, 10, 11, 13, 14)