Following figure shows $P-T$ graph for four processes $A, B, C$ and $D$. Select the correct alternative.
A$A$ - Isobaric process
B$B$ - Adiabatic process
C$C$ - Isochoric process
D$D$ - Isothermal process
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C$C$ - Isochoric process
c (c)
$(A)$ Temperature is constant - isothermal
$(B)$ Pressure is constant - Isobaric
$(C)$ Pressure $\propto$ Temperature - Isochoric process
$(D)$ $P^{1-\gamma} T^{\prime}=$ constant - Adiabatic process
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