What is the number of important gardens recorded in the $IABG$?

Generally,a museum is developed by:

How is the vivid body structure of birds and mammals preserved in museums?

Statement $P$: In botanical gardens,new species are developed through processes like grafting,tissue culture,cloning,and hybridization.
Statement $Q$: Botanical gardens provide necessary information regarding the identification of collected,authenticated,and newly discovered plant specimens.

What is established in zoological parks for the rare species of plants and animals?

Where is the National Botanical Research Institute $(NBRI)$ located?