Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Hormone-releasing IUDs like LNG-20 are highly effective contraceptive methods. Reason (R): Copper-releasing IUDs like Multiload 375 suppress sperm motility and the fertilising capacity of sperms. In the light of the above statements, choose the correct answer from the options given below:

Step-by-step solution

Assertion (A) is true because hormone-releasing IUDs (like LNG-20 and Progestasert) are indeed highly effective and popular contraceptive methods. They work by making the uterus unsuitable for implantation and the cervix hostile to the sperms. Reason (R) is also true because copper-releasing IUDs (like CuT, Cu7, Multiload 375) release copper ions that suppress sperm motility and fertilising capacity. However, Reason (R) describes the mechanism of copper-releasing IUDs, which does not explain the efficacy or mechani