Which of the following is the correct order of classification?
(a) Domain - Kingdom - Phylum - Class - Order - Family -Genus - Species
(b) Kingdom - Domain - Class - Phylum - Order - Family - Genus - Species
(c) Kingdom - Domain - Class - Phylum - Order - Genus - Species - Family
(d) Kingdom - Class - Phylum - Domain - Genus - Order - Family - Species

Options

A. Domain - Kingdom - Phylum - Class - Order - Family -Genus - Species
B. Kingdom - Domain - Class - Phylum - Order - Family - Genus - Species
C. Kingdom - Domain - Class - Phylum - Order - Genus - Species - Family
D. Kingdom - Class - Phylum - Domain - Genus - Order - Family - Species

Explanation

To determine the correct order of classification in biological taxonomy, we need to understand the hierarchical structure used in the classification of living organisms. The standard order of classification is as follows:

1. **Domain**: This is the highest taxonomic rank and includes the broadest categories of life. There are three domains: Archaea, Bacteria, and Eukarya.
2. **Kingdom**: Each domain is divided into kingdoms. For example, the Eukarya domain includes kingdoms such as Animalia, Plantae, and Fungi.
3. **Phylum**: Each kingdom is further divided into phyla (plural of phylum). For example, the Animalia kingdom includes phyla such as Chordata and Arthropoda.
4. **Class**: Each phylum is divided into classes. For instance, the Chordata phylum includes classes like Mammalia and Aves.
5. **Order**: Each class is divided into orders. For example, the Mammalia class includes orders such as Carnivora and Primates.
6. **Family**: Each order is divided into families. For instance, the Carnivora order includes families like Felidae (cats) and Canidae (dogs).
7. **Genus**: Each family is divided into genera (plural of genus). For example, the Felidae family includes genera such as Panthera (big cats) and Felis (small cats).
8. **Species**: This is the most specific level of classification and refers to individual organisms that can breed and produce fertile offspring. For example, Panthera leo refers to the lion species.

Now, let's evaluate the options provided:

(a) Domain - Kingdom - Phylum - Class - Order - Family - Genus - Species
(b) Kingdom - Domain - Class - Phylum - Order - Family - Genus - Species
(c) Kingdom - Domain - Class - Phylum - Order - Genus - Species - Family
(d) Kingdom - Class - Phylum - Domain - Genus - Order - Family - Species

The correct order of classification is **Domain - Kingdom - Phylum - Class - Order - Family - Genus - Species**, which corresponds to option (a).

### Final Answer:
The correct order of classification is (a) Domain - Kingdom - Phylum - Class - Order - Family - Genus - Species.