MCQ
Identify the number of aromatic compounds


- A$4$
- ✓$5$
- C$6$
- D$3$

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$C{H_3} - \mathop {\mathop {N\, - \,}\limits_{|\,\,\,\,\,\,} }\limits_{C{H_3}} \mathop {\mathop {C\,\,\, - }\limits_{|\,\,\,\,\,\,\,}^{|\,\,\,\,\,\,\,} }\limits_{{C_2}{H_5}}^{C{H_3}} C{H_2} - C{H_3}$
Assertion $A$ : The stability order of +$1$ oxidation state of $\mathrm{Ga}$, In and $\mathrm{Tl}$ is $\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}$.
Reason $R$ : The inert pair effect stabilizes the lower oxidation state down the group.
In the light of the above statements, choose the correct answer from the options given below :