Which is the largest botanical garden in the world? Name a few well-known botanical gardens in India.

Explanation-

Royal Botanical Garden, Kew (London) is the largest botanical garden in the world.

Some of the well known botanical gardens in India are as follows-

Indian Botanical Garden Sibpur, Kolkata
Lloyd Botanical Garden, Darjeeling
National Botanical Garden, Lucknow
Botanical Garden of FRI, Dehradun