Question

$(p\Rightarrow q)\to \left[\right(r\vee p)\Rightarrow (r\vee q\left)\right]$ is

• A. a tautology.
• B. a contradiction.
• C. a tautology and a contradiction.
• D. neither a tautology nor a contradiction.

Answer 1

The correct option is A a tautology.

Clearly, a tautology.