The correct answer is Khejri.
Key Points
Khejri:
- It is known as Kalp Vriksha of desert.
- Prosopis cineraria is the scientific name.
- It was declared a state tree in the year 1983.
- It has a nitrogen-fixing tree which enhances the fertility of the soil.
- In 1988, the Indian Postal Department issued a Postal Stamp of paisa 60 on Khejri.
- Khejri trees are found in the tropical thorny forest.

