In each of the questions given below four words are given in bold. These four words may or may not be in their correct position. The sentence is then ...

In each of the questions given below four words are given in bold. These four words may or may not be in their correct position. The sentence is then followed by options with the correct combination of words that should replace each other in order to make the sentence grammatically and contextually correct. Find the correct combination of the words that replace each other. If the sentence is correct as it is then select option ‘No correction required’ as your choice.

With parts of the pipes (1) being covered after laying of the canal (2) and construction material and debris strewn (3) along the banks, encroachers (4) are taking over the canal.