The least possible Venn diagram for the given statements is as shown below :
Conclusions: I. All games are matches → Does not follow (As all games are tournaments and some tournaments are matches. So it is possible but not definite.) II. No game is a tournament → Does not follow (As all games are tournaments. As whole games comes in tournament, therefore, game can not be tournament is false.) ∴ Here, Neither conclusion (I) nor (II) follow. Hence, the correct answer is "Neither conclusion (I) nor (II) follows"