Which among the four diseases are treated with biological products obtained from transgenic animals?

i. Emphysema

ii. AIDS

iii. Cystic fibrosis

iv. Phenylketonuria

Transgenic animals that produce useful biological products can be created by the introduction of the portion of DNA or genes that code for a particular product such as human protein α-1-antitrypsin used to treat emphysema phenylketonuria PKU and cystic fibrosis. Transgenic animals are made that carry genes that make them more sensitive to toxic substances than non-transgenic animals. The treatment of AIDS is the use of antivirals that are not obtained from transgenic animals.

The correct option is D Only i, iii and iv