Assertion [A]: Herbarium provides necessary information for verifying and identifying newly collected plant specimens.
Reason [R]: Botanical gardens promote eco-tourism for employment and sustainable life.
A and R both are true but R is not a correct explanation for A
The actual significance of a herbarium is to provide necessary information for verifying and identifying newly collected plant specimens. Botanical gardens serve for ex situ conservation of germplasm of different plants, to maintain rare and endemic plant species, and also to provide recreation and knowledge about plants to common man.