Question
Incorrect statements among the following is/are
The electronegativities decrease from $X$ to $Y$ to $Z$.
The atomic radius increases in the order $X , Y$ and $Z$ and $X , Y$ and $Z$ could be phosphorus, aluminium and sodium respectively.
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$(A)$ Stereochemistry of addition - SYN ONLY
$(B)$ Regiochemistry of addition- ANTI-MARKOVNIKOV OR ANTI-MARKOVNIKOV LIKE
Reason : Actual structure of benzene is a hybrid of following two structures.


${CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Br} \xrightarrow[\Delta]{\mathrm{KOH}_{(a k)}} \mathrm{A} \xrightarrow{\mathrm{HBr}} \mathrm{B} \xrightarrow[\mathrm{KOH}_{(a) i}]{\Delta} \mathrm{C}$