The following sentence has been divided into parts. One of them may contain an error. Select the part that contains the error from the given options. If you don’t find any error, mark ‘No error’ as your answer.

In India’s $600 billions agriculture sector, (A) / they are currently used for pesticide (B) / and nutrient application, mapping water spread area, (C) / sampling water, mapping macrophyte infestation, etc. (D)