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(B) The compound is $1-tert-butyl-3-isopropylbenzene$. Nitration is an electrophilic aromatic substitution reaction. The reactivity of the ring positi

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$B$

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(B) The compound is $1-tert-butyl-3-isopropylbenzene$. Nitration is an electrophilic aromatic substitution reaction. The reactivity of the ring positions is determined by the electron-donating groups present. The $-CH(CH_3)_2$ (isopropyl) group is more electron-donating than the $-C(CH_3)_3$ (tert-butyl) group due to hyperconjugation. Therefore,the positions ortho to the isopropyl group are more activated. Position $B$ is ortho to the isopropyl group and is less sterically hindered compared to position $A$ (which is between the two bulky alkyl groups). Thus,nitration occurs primarily at position $B$.

At which position of the given compound does nitration primarily take place?

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