In the following sentence, four words/phrases have been underlined. One of them is incorrect. Archaeologists in the Netherlands have discovered a 2,000-year-old stretch of Roman road and the remains of a Roman village at the town of Katwijk, who once marked the northern boundary of the Roman Empire.

In the following sentence, four words/phrases have been underlined. One of them is incorrect. Archaeologists in the Netherlands have discovered a 2,000-year-old stretch of Roman road and the remains of a Roman village at the town of Katwijk, who once marked the northern boundary of the Roman Empire. Correct Answer who once marked

The correct answer is 'who once marked', i.e. the error lies in this part of the sentence.

Key Points

• The error lies in the incorrect usage of the pronoun 'who'.
• 'Who' is needs to be replaced with 'which'.
• Pronouns are used in a sentence to replace a noun i.e. they point to a noun that is already mentioned in the sentence. 
• Here, in the above sentence 'who' is pointing towards 'the remains of a roman village' which is incorrect as 'who' is used to refer to people or human beings, whereas 'which' is used to refer to things or objects in general.

Therefore, the correct sentence is: Archaeologists in the Netherlands have discovered a 2,000-year-old stretch of Roman road and the remains of a Roman village at the town of Katwijk, which once marked the northern boundary of the Roman Empire.