What kind of information is provided to the general public by the members of botanical gardens?

Which of the following statements are correct about herbarium?

Where is the Lloyd Botanical Garden located?

Botanical gardens are used for obtaining integrated information about which of the following fields?

$S$ Statement: Herbaria are generally associated with botanical gardens and educational or research institutions.
$R$ Reason: $A$ botanical garden is a planned collection of trees,shrubs,herbs,climbers,and other living plants brought from different parts of the world for scientific purposes.
$(a)$ 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.

The famous herbarium of India,which is located in Kolkata,is known as: