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

Where is the zoological park named Indroda Park located?

Which is the famous herbarium located in the state of Gujarat?

$S$ Statement: Periodic poisoning is done to protect against fungi,insects,and moisture.
$R$ Reason: To preserve dried plant specimens,they are sprayed with specific chemicals; this process is called poisoning.
$(a)$ Both $S$ and $R$ are true,and $R$ is the correct explanation of $S$.
$(b)$ Both $S$ and $R$ are true,but $R$ is not the correct explanation of $S$.
$(c)$ $S$ is true and $R$ is false.
$(d)$ $S$ is false and $R$ is true.

Keys are generally . . . . . . in nature.

How do you prepare your own herbarium sheets? What are the different tools you carry with you while collecting plants for the preparation of a herbarium? What information should a preserved plant material on the herbarium sheet provide for taxonomical studies?