1) Cu-T

2) LNG-20

3) Lippes loop

4) all of the above

Answer:2) LNG-20

Explanation: IUDs are intrauterine devices and are the most widely used contraceptives in India. LNG-20 is the hormone-releasing IUD, Lippes loop is a non-medicated IUD and CuT is the Copper-releasing IUD. They work by affecting sperm motility, fertilisation capacity and thicken cervical mucus.

LNG-20 contains levonorgestrel similar to progesterone. It thickens the cervical mucus and makes the uterus unfavourable for implantation.

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