(i) A = {2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89 and 97}
As the  100collectioncounteddefinitionnot a setnot a well - definedperson to personprimeRichsettalent of  100collectioncounteddefinitionnot a setnot a well - definedperson to personprimeRichsettalent numbers upto  100collectioncounteddefinitionnot a setnot a well - definedperson to personprimeRichsettalent is known and can be  100collectioncounteddefinitionnot a setnot a well - definedperson to personprimeRichsettalent
(well defined). Hence this is a  100collectioncounteddefinitionnot a setnot a well - definedperson to personprimeRichsettalent.

(ii) The collection of rich people in India.
 100collectioncounteddefinitionnot a setnot a well - definedperson to personprimeRichsettalent people has no  100collectioncounteddefinitionnot a setnot a well - definedperson to personprimeRichsettalent.
Hence, it is  100collectioncounteddefinitionnot a setnot a well - definedperson to personprimeRichsettalent.

(iii) A = {Cauvery, Sindhu, Ganga, ... }
Hence, it is a  100collectioncounteddefinitionnot a setnot a well - definedperson to personprimeRichsettalent.

(iv) The collection of good hockey players is  100collectioncounteddefinitionnot a setnot a well - definedperson to personprimeRichsettalent collection because the criteria for determining a hockey player's  100collectioncounteddefinitionnot a setnot a well - definedperson to personprimeRichsettalent may vary from  100collectioncounteddefinitionnot a setnot a well - definedperson to personprimeRichsettalent. Hence, this collection is  100collectioncounteddefinitionnot a setnot a well - definedperson to personprimeRichsettalent.