Answer :
Long metal Rods are used to transmit the up and down motion of the lifter to the rocker arms at the top of the cylinder head, hence the correct option is b) Rods.
The lifter's up and down action is transferred to the rocker arms at the top of the cylinder head via long metal rods.
The motion of the lifter can be both upward and downward as it follows the cam profile which dictates the movement of the valve train components in an internal combustion engine.
In reference to the question which asks for a component of a mechanical linkage system in a car engine, the correct answer is Rods.
A mechanical linkage, such as the one mentioned with the Peaucellier-Lipkin linkage, is a system of parts used to change one type of motion into another.
In a car's engine, this linkage converts the linear (up and down) motion into rotary motion.
