Step 1: Concept
Vicinal dihalides have halogens attached to adjacent carbon atoms.
Step 2: Meaning
"Vicinal" comes from the Latin *vicinus* (neighbor).
Step 3: Analysis
In 1,2-Dibromopropane, the bromines are on $C_1$ and $C_2$. 1,1ndibromopropane is a geminal dihalide (same carbon).
Step 4: Conclusion
Hence, 1,2-Dibromopropane is a vicinal dihalide.
Final Answer: (B)