A) Some disinfectants can be used as antiseptic at low concentration.
B) Noretbindrone is a pheromone.
C) Aspirin is analgesic and antipyretic
D) [Su] phadiazine is a synthetic antibacterial.
Correct Answer: B
Solution :Norethindrone is not a pheromone. It is a progestin hormone. It is used for treating certain menstrual and uterine problems.
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