Which is the name of the pathogenic worm that lives in the muscles of some animals, such as pigs?

The name of the pathogenic worm that lives in the muscles of some of the animals, such as the pigs is a type of pathogenic worm that is classified as a parasitic round worm that is called Trichinella or Trichina. 

the correct answer is 2 and 4

the answer is c because it is most logical.