Question
Which among the following compound show optical activity

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$'B'$ is
$(A)$ $T _1= T _2$ $(B)$ $T _3> T _1$
$(C)$ $W _{\text {isothermal }} > W _{\text {adiabatic }}$ $(D)$ $\Delta U_{\text {isothermal }}>\Delta U_{\text {adiabatic }}$