Answer : Option B

Explanation :

Total number of votes = 7500
Given that 20% of Percentage votes were invalid
=> Valid votes = 80%

$MF#%\text{Total valid votes = }7500 \times \dfrac{80}{100}$MF#%

$MF#%\begin{align}
&\text{=> Valid votes that 2nd candidate got = total valid votes } \times \dfrac{45}{100}\\
&=7500 \times \dfrac{80}{100}\times \dfrac{45}{100} = 75 \times \dfrac{4}{5} \times 45 = 75 \times 4 \times 9 = 300 \times 9 = 2700
\end{align} $MF#%