Contraceptives

Step 1: Understanding hormone releasing contraceptives.
LNG-20 is a type of intrauterine device (IUD) that releases hormones to prevent pregnancy. The other options are IUDs that primarily function with copper ions.
Step 2: Analyzing the options.
(1) Cu-T: Incorrect. Cu-T is a copper-based IUD, not a hormone-releasing one.
(2) Cu-7: Incorrect. Cu-7 is also a copper IUD, not a hormone-releasing one.
(3) Multiload-375: Incorrect. This is a copper IUD as well.
(4) LNG-20: Correct. LNG-20 is a hormone-releasing IUD.
Step 3: Conclusion.
The correct answer is (4) LNG-20, as it is a hormone-releasing contraceptive.