Q.

Which of the following represents the order of 'Horse'                       [2017]

1 Perissodactyla  
2 Caballus  
3 Ferus  
4 Equidae  

Ans.

(1)

Perissodactyla represents the order of horse. Equidae is the family, caballus is the subspecies, whereas E. ferus is the species of horse.