P-V diagram of a cyclic process ABCA is as shown in figure.Select the correct statement(s).

During process A to B, pressure and volume both are decreasing. Therefore, temperature and hence, internal energy of the gas will decrease (T∝PV) or ΔUA→B=negative. Further ΔWA→B is also negative as the volume is increasing. Hence, temperature should increase or ΔUB→C=positive. During C to A volume is constant while pressure is increasing. Therefore, temperature and hence, internal energy of the gas should increase or ΔUC→A = positive. During process CAB volume of the gas is decreasing. hence, work done by the gas is negative.