Correct Answer: $\frac{56}{45}$

Solution : Given:
$\frac{C}{L}:\frac{24}{27}:\frac{E}{N}:\:?$

Like, $\frac{C}{L}$ = $\frac{3\:\times\:9}{12\:\times\:(3\:–\;1)}$ = $\frac{3\:\times\:9}{12\:\times\:2}$ = $\frac{27}{24}$
Now, reciprocal of $\frac{27}{24}$ = $\frac{24}{27}$
Thus, $\frac{C}{L}$ is related to $\frac{24}{27}$.

Similarly, follow the same pattern for $\frac{E}{N}$ –
Like, $\frac{E}{N}$ = $\frac{5\:\times\:9}{14\:\times\:(5\:–\;1)}$ = $\frac{5\:\times\:9}{14\:\times\:4}$ = $\frac{45}{56}$
Now, reciprocal of $\frac{45}{56}$ = $\frac{56}{45}$

So, $\frac{E}{N}$ is related to $\frac{56}{45}$. Hence, the second option is correct.