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(B) The reaction sequence is as follows: $1$. The starting material is a triester of cyclopropane$-1,2,3-$tricarboxylic acid. $2$. Treatment with $KOH

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(B) The reaction sequence is as follows: $1$. The starting material is a triester of cyclopropane$-1,2,3-$tricarboxylic acid. $2$. Treatment with $KOH$ followed by $H_3O^+$ hydrolyzes the ester groups to carboxylic acid groups,yielding cyclopropane$-1,2,3-$tricarboxylic acid. $3$. Treatment with $PCl_5$ converts the carboxylic acid groups to acid chloride groups. $4$. Subsequent reduction with $LiAlH_4$ reduces the acid chloride groups to primary alcohol groups,resulting in cyclopropane$-1,2,3-$trimethanol. $5$. Finally,heating with $H^+$ causes dehydration and rearrangement to form benzene. Thus,the product $(X)$ is benzene.

Product $(X)$ is

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