An unsecured loan (1)/ is a loan (2)/ which one could obtain (3)/ without providing any collateral (4)/ No error (5)

The sentence presented is primarily correct, but there is a small grammatical issue with part (1).

Break Down the Problem

1. Identify the error in the provided sentence.
2. Review the structure and grammar of the sentence to make necessary corrections.

Relevant Concepts

• Understanding the grammatical structure of sentences, particularly with article usage.

Analysis and Detail

1. The phrase "An unsecured loan" (1) sounds awkward because it typically is not preceded by "an" when it is followed by "is."
2. The correct structure should read simply "Unsecured loan" because "loan" is a countable noun and should not be preceded by "an" in this context.

Verify and Summarize

The rest of the sentence (parts 2, 3, 4, and 5) is correctly stated. The primary issue is with article usage in part (1).

Final Answer

The error is in (1): It should be "Unsecured loan is a loan..." instead of "An unsecured loan is a loan...".