MCQ
The correct $IUPAC$ name of the compound is


- A$1 -$ Ethenylcyclohexa $-2, 4 -$ diene
- ✓$5 -$ Ethenylcyclohexa $-1, 3 -$ diene
- C$6 -$ Ethenylcyclohexa $-1, 3 -$ diene
- DCyclohexa $-2, 4 -$ dienylethene

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| Energy level | $K$ | $L$ | $M$ | $N$ |
| $n=1$ | $n=2$ | $n=3$ | $n=4.....n=\infty$ | |
| Energy | $- 864 \,a.u.$ | Zero |
the excitation energy needed to raise the electron from $M$ level to $n = \infty$ would be :