Spermicides is the contraceptive method that its own is least likely to prevent pregnancy. Thus, the correct option is B.
What are Contraceptive methods?
Contraceptive methods may be defined as those methods which are designed in order to prevent pregnancy.
It includes condoms, diaphragms, cervical caps, contraceptive sponges, etc.
Spermicide is a contraceptive substance that has the efficiency to destroy the sperm which is inserted vaginally prior to sexual intercourse to prevent pregnancy.
But this method of contraception is the least effective method to prevent pregnancy because it has less efficiency as compared to the other methods.
Therefore, the correct option for this question is B.
To learn more about Contraceptive methods, refer to the link:
https://brainly.com/question/967671
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