MCQ
Among the following structures, select $E$ isomers (arrows indicate the bonds to be considered) ?


- A$1$ and $2$
- B$1$ and $3$
- ✓$1$ and $4$
- D$2$ and $3$


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$(I)$ $\phi -CH_3$
$(II)$ $\phi -CH_2-CH_3$
$(III)$ $\phi -CH(CH_3)_2$
$(IV)$ $\phi-C(CH_3)_3$
towards electrophilic substitution will be - [where $\phi =C_6H_5$]