To be honest, I think this is a badly constructed question. I assume this is not for an English class, but likely some sort of science or something related to mathematics? Even as a native speaker, I can't really even guess what it is trying to ask. Perhaps go to your instructor for further clarification. If I were to make a guess about how this question should be written, I would say that it should say: "What is the quantity of tuples that are inconsistent with the relation (relationship)?" But even with this question, it doesn't make sense, because I would then ask myself "relation to what?" "what kind of relationship?" Also, the question is asking about "quantity," so I would expect the answer to be a number or something measurable; unless it is asking for you to provide a term that matches the above definition, which case, I'd probably ask: "What is defined as "the quantity of tuples that are inconsistent with the relationship?" Still, it's very unclear. I'm sorry I could not be of much help, but I hope this at least points you in the right direction.

Add a third speaker as well. What I think the question should be, "What is the relationship in this tuple?" Most probably it is a mathematical test question. A tuple is a ordered finite sequence of elements.

As Lee said, it is simply not correct English. You should complain to whoever wrote it, or provided it, if it is an exam question. Tell them that two separate well-educated native speakers from two completely different countries both agreed that it is meaningless.

that is all .. this is a exam question. 12. What is the quantity of tuples in consist of the relation? 1) Degree, 2) Instance 3) Domain, 4) Cardinality its all...

Can you please show us the source for this sentence. It is not written correctly. "in consist of the relation" does not make any sense.