The correct match is

Explanation

In the case (a) the closed curve is anticlockwise. So the net work done is negative, implying that the work done on the system is greater than the work done by the system. The area under the curve BC will give work done on the gas (isobaric compression) and area under the curve. DA (work done by the system) will give the total work done by the system.
Area under the curve BC = Area of rectangle `BC12 = 1 xx 4 = - 4J`
Area under the curve `DA = 1 xx 2 = + 2J`
Net work done in cyclic process `=-4 + 2=-2 J`