Genetic engineering has been successfully used for producing
Animals like bulls for farm work as they have super power
Transgenic mice for testing safety of polio vaccine before use in humans
Transgenic models for studying new treatments for certain cardiac diseases
Transgenic Cow-Rosie which produces high fat milk for making ghee
Bulls are produced by animal breeding, not genetic engineering. Rosie produces cow milk which is good for human babies. Mice are used as models for many experiments and testing vaccine safety. The correct option is b.