If A, B and C are true statements and X, Y and Z are false statements, which of the following is true?
1.(A.X) ∨ (B.Y)
2.∼(X∨Z).(∼X∨Z)
3.∼[(A.B) ∨ ∼(B.A)]
4.∼{∼[(B.∼C) ∨ (Y.∼Z)].[(∼B∨X) ∨ (B∨∼Y)]}
5.∼[(A∨B).∼(B∨A)]
A1, 3
B2
C1, 4
D3, 4
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