Step 1: Identify the role of Lippe's Loop, LNG-20, and Implants.
- Lippe's Loop: It is a form of intrauterine device used for contraception.
- LNG-20: It is also an intrauterine device that releases hormones.
- Implants: These are subcutaneous devices and not intrauterine devices.
Step 2: Identify the devices that are not part of IUDs.
- Saheli: This is a contraceptive pill, not an intrauterine device.
Conclusion:
Thus, the correct answer is (4) (C), (B) and (D) only.
Final Answer:
\[
\boxed{\text{The correct answer is (C), (B) and (D) only.}}
\]