The stones obtained by blasting are used as A. Ballast in railways B. Aggregates for concrete C. Road metal D. All the above

The correct answer is D. All the above.

Stones obtained by blasting are used in a variety of applications, including:

• Ballast in railways: Ballast is a layer of crushed stone or gravel that is used to support the rails and ties of a railway track. It helps to distribute the weight of the train evenly and prevents the track from shifting.
• Aggregates for concrete: Concrete is a mixture of cement, water, and aggregates (small stones or gravel). The aggregates provide strength and durability to the concrete.
• Road metal: Road metal is a layer of crushed stone or gravel that is used to provide a stable foundation for roads. It helps to prevent the road from becoming rutted or damaged by heavy traffic.

In addition to these applications, stones obtained by blasting can also be used in the construction of buildings, bridges, and other structures. They can also be used in landscaping and gardening.