MathematicsMedium115×since 2008Q4368The number of choices for Δ∈{∧,∨,⇒,⇔}\Delta \in \{ \wedge , \vee , \Rightarrow , \Leftrightarrow \}Δ∈{∧,∨,⇒,⇔}, such that (pΔq)⇒((pΔ∼q)∨((∼p)Δq))(p\Delta q) \Rightarrow ((p\Delta \sim q) \vee (( \sim p)\Delta q))(pΔq)⇒((pΔ∼q)∨((∼p)Δq)) is a tautology, is :A1B2C3D4Check answerSkip