To solve this question, the user needs to have knowledge about the concept of a bag data structure. A bag is a collection of unordered elements that may contain duplicates.
Now, let's go through each option and explain why it is right or wrong:
a) bag has index column: This statement is incorrect. A bag is an unordered collection, which means it does not have an index column. Items in a bag are stored in any order.
b) bag permits duplicate element values: This statement is correct. A bag allows duplicate elements to be added to it. For example, a bag can contain two or more items with the same value.
c) bag does not permit duplicate element values: This statement is incorrect. A bag permits duplicate elements to be added to it. Therefore, this statement is false.
d) None: This option is incorrect because option B is correct.
The Answer is: B