The correct answer is option (3) as both statement I and statement II are correct. Antibiotics are chemicals produced by microorganisms. Antibiotics have the capacity to inhibit the growth and eventually destroy bacterial and other microorganisms in low concentration. Thus, statement I is correct. Antibodies are immunoglobulins produced in the body in response to any attack from pathogens. Antibodies facilitate killing of microbes by various mechanisms and provide immunity to the body. Thus, statement II is also correct.