A compound steam engine in which the high pressure and low pressure cylinders have common piston rod is called __________

A compound steam engine in which the high pressure and low pressure c

1.	A compound steam engine in which the high pressure and low pressure cylinders have common piston rod is called __________
A.	Tandem type compound engine
B.	Woolf type compound engine
C.	Receiver type compound engine
D.	None of the mentioned
Answer» B. Woolf type compound engine