MCQ
The $- NH _2$ group for electrophilic substitution is :
- Am-directing
- ✓o- and p-directing
- Conly o-directing
- Donly p-directing
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[where $Et$ is $- C _{2} H _{5}$ ]
Compound $'A'$
$X$ and $Y$ are
[Atomic number of $\mathrm{Gd}=64$ ]