Direction: In the given question a sentence is divided into four parts out of which the first part is correct. The remaining parts may/may not be erroneous. Choose the part/parts that is/are erroneous. If all the remaining three parts are correct, mark option 5 i.e. All are correct as the answer.

This was unusual, as Bird Song's matron (A) had pester him about the details (B) of the emerging flora since he had (C) arrived on the inn the prior week. (D)