The given figure shows the output torque plotted against crank positions for a single cylinder four – stroke – cycle engine. The areas lying above the zero – torque line represent positive work and the areas below represent negative work. The engine drives a machine which offers a resisting torque magnitudes of the hatched areas are given by number in the areas) as shown:
During the cycle, the minimum speed occurs in
(a) A (b) D (c) C (d) F