Answer:
Option (B,C,D)
Explanation:
(b) Process- I t is isothermal
expansion △U=0,W>0
△Q=W>0
(c) Process - IV is isothermal compression
△U=0,W<0
△Q=0,W<0
(d) Process - I and III are not isobaric beacause in isobaric process T α V hence, T-V graph should be a straight line passing through origin.