Question 6

Four pairs listed are exact duplicates.

Out of the five pairs presented, four pairs are exact duplicates, specifically 8692-8692, 20834-20834, 958541-958541, and 48961275-48961275. The pair 2370683-2370863 does not match and therefore does not count as a duplicate.

A) 2

This option is incorrect because it underestimates the number of exact duplicates. There are four pairs that are exact matches, making this choice inaccurate.

B) 3

While this option suggests that three pairs are duplicates, it is also incorrect. There are actually four pairs that are exact duplicates, thus this answer does not reflect the actual count.

C) 4

This option accurately identifies that four pairs are exact duplicates. The pairs 8692-8692, 20834-20834, 958541-958541, and 48961275-48961275 all perfectly match, confirming this choice as correct.

D) 5

This option is incorrect as it suggests all five pairs are duplicates. The pair 2370683-2370863 is not an exact match, which disqualifies this choice from being correct.

E) none

This option is also incorrect because there are indeed pairs that are exact duplicates. The presence of four exact matches invalidates this choice.

Conclusion

The correct answer is C, as it correctly identifies four pairs that are exact duplicates. All other options fail to accurately count the number of duplicates, either underestimating or overestimating the total. Thus, C is the only option that aligns with the provided pairs.