Which classification system is used in most of the world's prominent herbaria?

Which of the following statements are correct?
$I.$ Plants collected during field studies are pressed and dried on herbarium sheets.
$II.$ The label on the right-hand side of the herbarium sheet contains the scientific name,family,and common name of the plant.
$III.$ Botanical gardens contain collections of plant specimens as well as illustrations,slides,maps,and photographs.
$IV.$ Living plants can be observed and identified in botanical gardens.

What is the primary importance of museums in the context of biological studies?

Why is the importance of botanical gardens increasing?

Where is the $Zoological$ $Survey$ $of$ $India$ $(ZSI)$ located?

Where are biological museums generally set up?