Through which component does oil flow to reach the piston pin and the piston?

Oil flows to the piston pin and the piston through the connecting rod. The connecting rod is a crucial component that links the piston to the crankshaft in an internal combustion engine. When the engine operates, the connecting rod receives oil from the crankshaft, which lubricates the upper end of the connecting rod where it connects to the piston. This oil helps to reduce friction and wear at the piston pin, ensuring smooth movement as the piston reciprocates within the cylinder. Additionally, the connecting rod has passages that allow the oil to circulate effectively, ensuring that the piston receives the necessary lubrication to function optimally during engine operation.

The other components mentioned in the choices, such as the crankshaft and camshaft, play significant roles in the engine but do not directly carry the oil to the piston pin. The sump, on the other hand, is responsible for reserving the engine oil but does not provide the direct pathway for oil flow to the piston.