MCQ
Which of the following is $E$ isomer :
- ✓

- B

- C

- D






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$A$. $\mathrm{Fe}$ $B$. $\mathrm{Mn}$ $C$. $\mathrm{Ni}$ $D$. $\mathrm{Cr}$ $E$. $\mathrm{Cd}$
Choose the correct answer from the options given below:
[Given $pK _{ a }$ of $CH _{3} COOH =4.57$ ]
