The correct answer is D. All of the above.
Sal (Shorea robusta), teak (Tectona grandis), and khair (Acacia catechu) are all tree species that are included in the nationalized tree list in Chhattisgarh. The nationalized tree list is a list of tree species that are protected by the government. These trees cannot be cut down without a permit.
Sal is a large deciduous tree that is native to the Indian subcontinent. It is the most important tree species in the forests of Chhattisgarh. Sal wood is used for a variety of purposes, including construction, furniture making, and papermaking.
Teak is a large evergreen tree that is native to tropical Asia. It is a valuable timber tree that is used for a variety of purposes, including furniture making, boat building, and flooring.
Khair is a large deciduous tree that is native to the Indian subcontinent. It is a valuable timber tree that is used for a variety of purposes, including furniture making, boat building, and fuelwood.