For the indicator diagram shown in figure three processes are mentioned A,B & C. For these 3 processes mark the correct statement(s).

As one point on A & B is common, so relation between A & B exists but this is totally independent of C. 

As we know slope of adiabatic curve is steeper than slope of isotherm, so if A is isotherm then B may be adiabatic (or some other polytropic process) but reverse is not possible. C can be any process (except isobaric or isochoric) as no state is prescribed