Which of the following statement is correct?
(1) Over 95% of all existing transgenic animals are mice
(2) RNAi takes place in all the prokaryotic organisms as a method of cellular defense
(3) In micro-injection, recombinant DNA is directly injected into the nucleus of an animal cell
(4) Transcription is a procedure through which a piece of DNA is introduced in a host bacterium
Choose the correct answer from the options given below:

Correct option is A

Animals that have had their DNA manipulated to possess and express an extra (foreign) gene are known as transgenic animals. Transgenic animals can be specifically designed to allow the study of how genes are regulated, and how they affect the normal functions of the body and its development, e.g., study of complex factors involved in growth such as insulin-like growth factor. Transformation is a procedure through which a piece of DNA is introduced in a host bacterium. RNAi takes place in all eukaryotic organisms as a method of cellular defense