Which of the following chemicals is used for poisoning the specimens in herbarium technique?

In which place is the stuffing technique used?

Where are plants of medicinal,rare,and economic importance cultivated?

Which of the following taxonomic aids is used exclusively for animals?

Statement $P$: Botanical gardens provide necessary information regarding the identification of collected,authenticated,and newly discovered plant specimens.
Statement $Q$: Zoological parks provide information regarding the rehabilitation and care of rescued animals.

Which of the following provides facilities for botanical taxonomic research?