Statements: Only those who have a pair of binoculars become the members of the birdwatcher's club. Some members of the birdwatcher's club have cameras. Those members who have cameras can take part photo contests.
Conclusions:
I. All those who have a pair of binoculars are members of the birdwatcher's club.
II. All members of the birdwatcher's club have a pair of binoculars.
III. All those who take part in photo-contests are members of the birdwatcher's club.
Only conclusion II follows
Only those who have binoculars can be a part of birdwatcher's club, hence all the members of birdwatcher's club will have binoculars for sure. But all those who have binoculars may not be part of birdwatcher's club.