Study the given graph and answer the question that follows.

In which month is the actual production of AC's is 66% more than the target production?

Required % = $$\frac{actual-target}{target}\times\ 100$$

We will check option wise :

Option A : April

$$\therefore\ \frac{\left(70-60\right)}{60}\times\ 100=16\ \frac{\ 2}{3}\%$$

Option B : February

$$\therefore\ \frac{\left(50-30\right)}{30}\times\ 100=66\frac{\ 2}{3}\%$$

Option C : March

$$\therefore\ \frac{\left(100-80\right)}{80}\times\ 100=25\%$$

Option D : May

$$\therefore\ \frac{\left(120-100\right)}{100}\times\ 100=20\%$$

Hence, Option B is correct.