Which of the following statement is true :-

Options

A. `~(pharr~q)` is tautology
B. `~(pharr~q)` is equivalent to `pharrq`
C. `(p^^~q)` is a fallacy
D. `(p^^~q)^^(~p^^q)` is a tautology

Answer

B

Explanation

The truth table for all options are as follows in below table