Question

ICBN was adopted in
A. 1951
B. 1971
C. 1961
D. 1981

Answer 1

ICBN stands for the international code of botanical nomenclature, and it is the system that gives the set of rules while naming the plant, and this system insist that plant should have only one correct name and that should be accepted worldwide.

Complete answer: The international code of botanical nomenclature was set up for formal naming of the plant.
In general, the name of the plant has two parts, and this type of naming plant was first introduced by Carolus Linnaeus.
So the plant name which has two parts and this is called binomial nomenclature, and this system of binomial nomenclature was first suggested by Linnaeus.
The reason for suggesting the binomial nomenclature is to present the genus and species of each plant to avoid confusion.
And this binomial nomenclature is universally accepted, as said above it has two names, the first name represents the genus of the plant, and the second name represents the species of plant.
For example, Mangifera indica is the botanical name for a plant, where it is commonly called as mango. Here Mangifera is the genus and India is the species name.
So this ICBN is the set of rules and recommendations which was established for formal naming of the plants. And this ICBN was adopted in 1961.
Initially, when it was established it applied the rules only for the plants, where it only deals with plants, later it also deals with other organisms such as fungi, algae.
According to the rules of ICBN, each taxonomic group can have only one name.
The scientific names of taxonomic groups are given or derived from Latin.
The change in the code of nomenclature was very limited. Where all the proposals to change the code are published in Taxon.
So the correct option is C.

Note: So to simply say the plants generally have two name parts in their botanical name, so this type of nomenclature was given by Linnaeus, and this naming has set of rules which were given by ICBN and it was adopted in the year 1961.