JEE Main 1998 Mathematics question on Probability

1. A.
   occurrence of $E \Rightarrow$ occurrence of $F$
2. B.
   occurrence of $F \Rightarrow$ occurrence of $E$
3. C.
   non-occurrence of $E \Rightarrow$ non-occurrence of $F$
4. D.
   None of the above

[1998]