- International Code of Botanical Nomenclature (ICBN): This is the correct answer. ICBN is the set of rules and recommendations used for naming plants, algae, and fungi. It ensures the use of standardized scientific names and classifications in botanical research.
- International Committee of Biotech Nomenclature: This is not the correct term. There is no specific nomenclature committee for biotechnology referred to by this acronym.
- International Code of Business Nomenclature: This is incorrect. There is no widely known nomenclature code in business specifically called ICBN.
- International Convention of Botanical Naming: This is an incorrect term. The correct term is International Code of Botanical Nomenclature.
Thus, the correct answer is International Code of Botanical Nomenclature (1).