1.Which of the following Boolean expressions is not a tautology?a.(p⇒q)∨(¬q⇒p)(p \Rightarrow q) \vee (\neg q \Rightarrow p)(p⇒q)∨(¬q⇒p)b.(q⇒p)∨(¬q⇒p)(q \Rightarrow p) \vee (\neg q \Rightarrow p)(q⇒p)∨(¬q⇒p)c.(p⇒¬q)∨(¬q⇒p)(p \Rightarrow \neg q) \vee (\neg q \Rightarrow p)(p⇒¬q)∨(¬q⇒p)d.(¬p⇒q)∨(¬q⇒p)(\neg p \Rightarrow q) \vee (\neg q \Rightarrow p)(¬p⇒q)∨(¬q⇒p)Login to continueOnly logged in users canattempt or see the solution.