Question
Which of the following can show optical activity
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(Atomic Mass of $\mathrm{Ba}=137 \,\mathrm{u})$
$(A)$ $m-CH_3OPhCH_2^+$ $(B)$ $p-CH_3OPhCH_2^+$ $(C)$ $PhCH_2^+$ $(D)$ $p-NO_2PhCH_2^+$
$'C'$ is water soluble
Correct structure of $A$ and $D$ are
