Step 1: Concept
Use the standard limit $\lim_{\theta\rightarrow0} \frac{\sin\theta}{\theta} = 1$.
Step 2: Meaning
Rewrite as $\lim_{x\rightarrow0} \frac{\sin(\pi \sin^2 x)}{\pi \sin^2 x} \times \frac{\pi \sin^2 x}{x^2}$.
Step 3: Analysis
The first part goes to 1 as $x\rightarrow0$. The second part is $\pi \times (\lim_{x\rightarrow0} \frac{\sin x}{x})^2 = \pi \times 1^2$.
Step 4: Conclusion
The final limit is $\pi$.
Final Answer: (B)