1. The problem asks to identify the stroke shown in the engine diagram with the piston moving upward, inlet valve on the left, and exhaust valve on the right. 2. The four strokes of a four-stroke engine are: - Intake stroke: piston moves down, inlet valve open, exhaust valve closed. - Compression stroke: piston moves up, both valves closed. - Power stroke: piston moves down, both valves closed. - Exhaust stroke: piston moves up, exhaust valve open, inlet valve closed. 3. In the diagram, the piston is moving upward and the inlet valve is open, which matches the exhaust stroke where the piston pushes out exhaust gases. 4. Therefore, the stroke shown is the exhaust stroke (D). Final answer: D exhaust