MCQ
Unit of unsaturation in compound $(A)$ ?


- A$7$
- B$8$
- ✓$9$
- D$10$

$D. B. E. = 7$
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$C{H_3} - \mathop C\limits^{\mathop {||}\limits^O } - O - C{H_2} - \mathop C\limits^{\mathop {||}\limits^O } - C{H_2} - N{H_2}$

