Statement $\left( {p \wedge q} \right) \to \left( {p \vee q} \right)$ is

Which of the following is the negation of the statement "for all $M\,>\,0$, there exists $x \in S$ such that $\mathrm{x} \geq \mathrm{M}^{\prime \prime} ?$

Which Venn diagram represent the truth of the statements “No child is naughty”

Where $U$ = Universal set of human beings, $C$ = Set of children, $N$ = Set of naughty persons

Consider the statement : "For an integer $n$, if $n ^{3}-1$ is even, then $n$ is odd." The contrapositive statement of this statement is

Which of the following Boolean expression is a tautology ?

Consider

Statement $-1 :$$\left( {p \wedge \sim q} \right) \wedge \left( { \sim p \wedge q} \right)$ is a fallacy.

Statement $-2 :$$(p \rightarrow q) \leftrightarrow ( \sim q \rightarrow   \sim  p )$  is a tautology.