Which of the following is an equivalence relation?

Let A= {a,b,c}. Which of the following is not an equivalence relation in A?

Let A = {1, 2, 3}. Which of the following is not an equivalence relation on A ?

Which of the following is not an equivalence relation on I,the set of integers x,y in I?

Let A = {1, 2, 3}. Which of the following is not an equivalence relation on A ?

Which of the following is not an equivalence relation on Z ? a\ R\ bhArra-b is an even integer

Let A={1,2,3}. Which of the following is not an equivalence relation on A?

Which of the following is not an equivalence relation on Z ? a\ R\ bhArra+b is an even integer (b) a\ R\ bhArra-b is an even integer (c) a\ R\ bhArra=b

Which of the following are not equivalence relations on I?