1)

 Which of the following is not equivalent to p → q


A) p only if q

B) q is necessary for p

C) q only if p

D) p is sufficient for q

Answer:

Option C

Explanation:

 p → q means

(i) p is sufficient for q

(ii)   p only it q

(iii)  q is a necessary to condition for p

(iv)  $\sim q\rightarrow \sim p$