The correct answer is granite. Granite is a hard, durable stone that is resistant to weathering and erosion. It is also a strong stone that can withstand the weight of a railway bridge. Sandstone is a softer stone that is not as durable as granite. It is also more porous, which means that it can absorb water and become weaker over time. Limestone is a sedimentary rock that is composed of calcium carbonate. It is a relatively soft stone that is not as durable as granite or sandstone. Quartzite is a metamorphic rock that is composed of quartz. It is a hard, durable stone that is resistant to weathering and erosion. However, it is not as strong as granite and can be more difficult to work with.
Granite is the best choice for the construction of piers and abutments of a railway bridge because it is a hard, durable stone that is resistant to weathering and erosion. It is also a strong stone that can withstand the weight of a railway bridge.