- ✓Antiperiplanar transition state is involved in $S_N2$
- B$E_1CB$ involves carbanion intermediate
- CEthene is formed when ethanol at $443\ k$ is heated with an excess of concentrated sulphuric acid.
- DAcetone can not undergo cannizzaro reaction
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(Atomic No. $Y = 39$, $La = 57$, $Eu = 63$, $Lu = 71$)
Statement $I$: Aniline reacts with con. $\mathrm{H}_2 \mathrm{SO}_4$ followed by heating at $453-473 \mathrm{~K}$ gives $\mathrm{p}$ aminobenzene sulphonic acid, which gives blood red colour in the 'Lassaigne's test'.
Statement $II$: In Friedel - Craft's alkylation and acylation reactions, aniline forms salt with the $\mathrm{AlCl}_3$ catalyst. Due to this, nitrogen of aniline aquires a positive charge and acts as deactivating group.
In the light of the above statements, choose the correct answer from the options given below :
The number of carbon atoms present in the product $B$ is $.....$