Which one of the followings is not a transgenic animal?

Lion

The correct answer is Option (3) → Lion 

Animals that have had their DNA manipulated to possess and express an extra (foreign) gene are known as transgenic animals. Transgenic rats, rabbits, pigs, sheep, cows and fish have been produced, although over 95 per cent of all existing transgenic animals are mice.  The benefit of transgenic animals to humans is primarily focused on scientific and medical advancements. They are used in various research and testing applications.

Transgenic mice are being developed for use in testing the safety of vaccines before they are used on humans. Transgenic mice are being used to test the safety of the polio vaccine. If successful and found to be reliable, they could replace the use of monkeys to test the safety of batches of the vaccine.