In which year the percentage increase in production as compared to previous year is maximum ?

Answer: Option B

Explanation:

Let find the percentage increase in production compared to previous year for different years:

\begin{aligned}
\text{In 1997 =}\frac{60-40}{40}*100 \% \\
= 50 \% \\

\text{In 1996 =}\frac{40-25}{25}*100 \% \\
= 60 \% \\

\text{In 1999 =}\frac{65-45}{45}*100 \% \\
= 44.44 \% \\

\text{In 2001 =}\frac{75-50}{50}*100 \% \\
= 50 \% \\
\end{aligned}

So percentage increase is maximum in 1996.