The $P-V$ diagram of $2$ gm of helium gas for a certain process $A \to B$ is shown in the figure. what is the heat given to the gas during the process $A \to B$
  • A$4{P_o}{V_o}$
  • B$6{P_o}{V_o}$
  • C$4.5{P_o}{V_o}$
  • D$2{P_o}{V_o}$
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