Carriage rack is running over the ------ Pinion wheelEscapement wheelLoose dogAi onlyBii, iiiCiii onlyDii onlyAnswer: A. i only Read Explanation: Pinion Wheel and escapement wheel are in the same stud in some of the typewriters and cannot rotate independently.In such cases when the pinion rotates, the escapement wheel also rotates.The Carriage rack is running over the pinion wheel. Read more in App