Direction: In the given question a sentence is divided into five parts out of which the last part is correct. Out of the remaining four, there are errors in three parts. Choose the part that doesn't have an error. If all the four parts are correct, mark E i.e. All are correct as the answer.

A great deal has been made on Peter's infidelity (A) towards its consort; but the (B) only one who really suffered from his (C) liaison by the ugly, stupid, and vixenish countess (D) Elizabeth Vorontsova was the unfortunate emperor.