Given below are some properties related to botanical and zoological nomenclature.

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Correct combination that distinguishes botanical nomenclature from zoological nomenclature system is as follows :
        In plant nomenclature (ICBN), tautonyms are not valid i.e. generic name and specific name should not be same in plants. Ego Mangifera mangifera But tautonyms are valid for animal nomenclature (ICZN-International Code of Zoological Nomenclature) e and Naja naja (Indian cobra), Rattus rattus (Rat). Hence statement A is correct.
        Article 4.1 of the ICBN states that ‘A plant may be assigned to taxa of the following ranks (in descending sequence) regnum, subregnum, divisio, subdivisio, classis, subclassis, ordo, subordo, familia, subfamilia, tribus, subtribus, genus, subgenus, sectio, subsectio, series, subseries, species, subspecies, varietas, subvarietas, forma, subforma. ARTICLE 
        24.1: The name of an infraspecific taxon is a combination of the name of a species and an infraspecific epithet connected by a term denoting its rank.
        An item often overlooked in this respect is that the infraspecific epithet should be preceded by a term denoting its rank. This applies not only when introducing a new taxon, but also when quoting one, since the article clearly states that this term is part of the name. Therefore Discoaster tanii nodifer, which is commonly used, should correctly be cited as Discoaster tanii subsp nodifer.
        Although the term is abbreviated as ‘subsp.’ |In the ICBN, the abbreviation ‘ssp.’ is also very common, and can be considered correct. Hence statement B is wrong as there are other ranks considered too.
        Statement of the Principle of Coordination. -A name established for a taxon at any rank in the family group, the phytoflagellates excepted, is deemed to be established with the same author and date for taxa based upon the same name-bearing type (type genus) at other ranks in the family group, with appropriate mandatory change of suffix. A name generated in zoological nomenclature in accordance with the Principle of Coordination is not considered validly published under the botanical Code unless it appears in print and is applied to an accepted taxon. Hence statement C is right. Statement D is wrong as there are other type specimen terms like isotype, lectotype etc. Therefore the correct combination is A and C.