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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${X_2} + {O_2} \rightleftharpoons 2XO\,\,\,\,\,\,\,\,\,\,\,{K_1} = 5$
${X_2} + 2{O_2} \rightleftharpoons 2X{O_2}\,\,\,\,\,\,\,\,\,\,\,{K_2} = 10$