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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$(I) \,CO_3^{-2}$ $(II)\, XeF_4$
$(III)\, I^-_3$ $(IV)\, NCl_3$
$(V)\, BeCl_2$

