Which of the following is NOT a common mode of transportation in the supply chain?

• A. Air
• B. Bus
• C. Rail
• D. Truck

Answer: (B)

In the supply chain, the common ways to move goods are air, road (truck), rail, and ocean. Each mode fits different needs: air for time‑sensitive or high‑value items; truck for flexible, door‑to‑door delivery; rail for high‑volume, long‑distance moves; and ocean for cost‑effective bulk transport over seas. A bus is designed for passengers and isn’t set up for freight—its capacity, loading/unloading infrastructure, weight limits, and regulatory framework don’t align with typical shipping needs. Because of that mismatch in purpose and practicality, it isn’t used as a standard freight mode, making it the not‑common option in the supply chain. In some niche urban or specialized cases, you might see nonstandard freight solutions, but they’re exceptions rather than the norm.