An epicyclic gear train has 3 shafts A, B and (C) A is an input shaft running at 100rpm clockwise. B is an output shaft running at 250 rpm clockwise. Torque on A is 50 kNm (clockwise). C is a fixed shaft. The torque to fix C
(a) Is 20 kNm anti clockwise
(b) Is 30 kNm anti clockwise
(c) Is 30 kNm clockwise
(d) Cannot be determined as the data is insufficient