The correct option is B transgenic sheep
Dolly was a female domestic transgenic sheep and the first mammal cloned from an adult somatic cell, using the process of nuclear transfer. Animals whose DNA are manipulated to incorporate a foreign gene belonging to another organism 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.