Question

National botanical research institute located at
(a) Howrah
(b) Delhi
(c) Hyderabad
(d) Lucknow

Answer 1

Hint: Botanical gardens have three main functions: conservation, education, and bio aesthetic. It conserves exotic species of plants for study and research. It has rich genetic treasure with a collection of different types of plant species.

Complete Answer:
National botanical research institute located at Lucknow, Uttarpradesh. The national botanical research institute was set up by Kailash Nath Kaul as the National botanical garden. From 1953 this institute was regulated by CSIR. Sikandar Bagh is a famous historic garden located inside the institute. Taxonomy and modern biology is the main field of this institute.

Additional information:
Botanical gardens are institutions having a collection of a living plant of different varieties also called living herbaria. The main objective of the botanical garden is to select exotic species which help in gaining information regarding new species, serve as an ex- Situ area for conservation of endemic species, supply seeds for research, and house for germplasm collection of the plant.
The largest botanical garden in the world is the Royal Botanical garden in London. It covers 300 acres of land and it provides the best research facility for the botanist. Rock garden, victoria lily pond, jordell lab is famous here.
The first botanical garden was established in Mumbai and the largest botanical garden in Asia is Indian Botanic Garden located in Howrah.
Lal bagh/ Mysore Botanic garden located at Mysore, Bangalore has 1800 species of ornamental plant. It was established by Hyder Ali in 1760.
Botanic garden of FRI, Dehradun was the youngest botanic garden with a 50-hectare area and home for 1000 species of trees and shrubs.

So, the correct answer is Lucknow.

Note: The hanging garden was considered as a botanical garden but it was not a botanical garden, these gardens just grow herbs and ornamental plants. The first garden for education purposes was established by Theophrastus in Greece but this garden doesn't exist in the present time.