The number of choices of \( \Delta \in\{\wedge, \vee, \Rightarrow, \Leftrightarrow\} \), Such th...
The number of choices of \( \Delta \in\{\wedge, \vee, \Rightarrow, \Leftrightarrow\} \), Such that \( (p \Delta q) \Rightarrow((p \Delta \sim q) \vee((\sim p) \Delta q)) \) is tautology, is
(a) 1
(b) 2
(c) 3
(d) 4
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