Refer to figure. Let and be the change in internal energy in processes A and B respectively, `DeltaQ` be the net heat given to the system in process A+B and `DeltaW` be the net work done by the system in the process A+B
a) `DeltaU_(1)+DeltaU_(2)=0`
b) `DeltaU_(1)-DeltaU_(2)=0`
c) `DeltaQ-DeltaW=0`
d) `DeltaQ+DeltaW_=0`

Options

A. Only a, b are correct
B. only b, d are correct
C. only a, c are correct
D. only b, c are correct

Answer

C