If $F = n$ and $E = n + 1,$ then using Euler's formula, the value of $V,$ is:

3

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Solution

The correct option is B $3$
Given:-
$F = n$
$E = n + 1$

As per the Euler's formula,
$F - E + V = 2$
$\Rightarrow n - (n + 1) + V = 2$
$\Rightarrow n - n - 1 + V = 2$
$\Rightarrow V = 3$

Hence, option $A$ is correct.

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