The least possible Venn diagram for the given statements is:
Conclusions: I. All cats are animal. → False (No specific information given about cats and animals, hence, it is possible but not definite.) II. Some cats are not animal. → False ( No specific information given about cats and animals, hence, it is possible but not definite.) Both of the above conclusions are following the conditions of 'either -or' pair. Hence, either I or II follows.