The correct order of the level of classification isA. Kingdom, class, genus, familyB. Phylum, class, order, genusC. Species, order, family, phylumD. Class, kingdom, family, orderE. Genus, order, species, phylum

The correct order of the levels of classification is B. Phylum, class, order, genus.
The hierarchy of biological classification follows a specific order, starting from the broadest category (kingdom) and narrowing down to the most specific (species). The correct sequence of classification levels, from broadest to most specific, is:
1. Kingdom: The broadest level of classification, which includes all forms of life (e.g., Animalia, Plantae).
2. Phylum: A division within a kingdom, grouping organisms that share fundamental structural characteristics (e.g., Chordata).
3. Class: A subdivision within a phylum, grouping organisms with similar characteristics (e.g., Mammalia, Aves).
4. Order: A further subdivision within a class, grouping similar families (e.g., Carnivora).
5. Family: A group of related genera (plural of genus) (e.g., Felidae, Canidae).
6. Genus: A group of closely related species (e.g., Panthera).
7. Species: The most specific level of classification, representing individual organisms that can interbreed (e.g., Panthera leo).
Why Option B is Correct:
Option B (Phylum, class, order, genus) correctly follows the hierarchical order of classification, starting from phylum, followed by class, order, and then genus.
Why Other Options are Incorrect:
• Option A: The order should be family, not class before genus. The correct order would be Kingdom, Phylum, Class, Order, Family, Genus, Species.
• Option C: Species should come last, not first. The order should start with phylum, not species.
• Option D: This order is incorrect as it starts with class, followed by kingdom, which is not the correct sequence.
• Option E: The order should start with genus at a lower level, and phylum is higher in the hierarchy than genus.
Thus, the correct order of classification is B. Phylum, class, order, genus.