Question

Which of the following is not equivalent form of compound statement formed by the logical connective "if and only if" using the sub statements $p$ and $q$

• A. if $p,$ then $q$
• B. $q$ if and only if $p$
• C. $p$ if and only if $q$
• D. $p$ is necessary and sufficient condition for $q$ and vice - versa

Answer 1

The correct option is A if $p,$ then $q$

If $p$ then $q$ represents conditional statement where as remaining all other options represents bi conditional statements $p$if and only if $q$