The correct options are
C Transgenic mice for testing safety of polio vaccine before use in humans.
D Transgenic models for studying new treatments for certain cardiac diseases.
The first transgenic cow, Rosie was engineered for production of human protein-enriched more nutritional balanced milk (2.4 grams per litre). Rosie’s milk contains the human gene α-lactalbumin; which makes statement A incorrect. Transgenic bull was produced for lactoferrin in their milk which has antimicrobial activity and is components of innate defence; statement B is incorrect. Animal rabbit models have been used to study pathophysiology and treatment of cardiovascular diseases which makes statement D correct. Transgenic mice for testing safety of polio vaccine before use in human; for the purpose, they are subject to GSK test which measures the safety of the vaccine; statement C is correct.