The best sequence of reactions for preparation of the following...

The best sequence of reactions for preparation of the following compound from benzene is

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A( i) $\mathrm{CH}_3 \mathrm{COCl} / \mathrm{AlCl}_3$ (ii) Oleum (iii) \left(\mathrm{CH}_3\right)_2 \mathrm{CH}-\mathrm{Cl}(1 $mole$ ) / \mathrm{AlCl}_3
B(i) \left(\mathrm{CH}_3\right)_2 \mathrm{CH}-\mathrm{Cl}(1 $mole$ ) / \mathrm{AlCl}_3 $(ii)$ \mathrm{CH}_3 \mathrm{COCl} / \mathrm{AlCl}_3 $(iii) Oleum$
C(i) Oleum (ii) $\mathrm{CH}_3 \mathrm{COCl} / \mathrm{AlCl}_3$ (iii) \left(\mathrm{CH}_3\right)_2 \mathrm{CH}-\mathrm{Cl}(1 \mathrm{~mole}) / \mathrm{AlCl}_3
D(i) \left(\mathrm{CH}_3\right)_2 \mathrm{CH}-\mathrm{Cl}(1 $mole$ ) / \mathrm{AlCl}_3 $(ii) Oleum (iii)$ \mathrm{CH}_3 \mathrm{COCl} / \mathrm{AlCl}_3

Correct answer

B. (i) \left(\mathrm{CH}_3\right)_2 \mathrm{CH}-\mathrm{Cl}(1 $mole$ ) / \mathrm{AlCl}_3 $(ii)$ \mathrm{CH}_3 \mathrm{COCl} / \mathrm{AlCl}_3 $(iii) Oleum$

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