In the following sentence, four words or phrases have been printed in bold. One bold part in the sentence is not acceptable in Standard English. Pick up that part and mark its number. If there are no errors in the bold parts, mark (5) i.e. No error as the answer.

Despite the fact that they occupy/(A) similar ecological niches/(B), the social structure of Asian elephants differs/(C) from that of their African savanah/(D) counterparts.