Human protein, α-1-antitrypsin is used for the treatment of-

Emphysema

The correct answer is Option (3) → Emphysema

Transgenic animals can be used to produce valuable biological products, such as human protein α-1-antitrypsin, which is used to treat emphysema.

Medicines required to treat certain human diseases can contain biological products, but such products are often expensive to make. Transgenic animals that produce useful biological products can be created by the introduction of the portion of DNA (or genes) which codes for a particular product such as human protein (α-1-antitrypsin) used to treat emphysema.