Step 1: Understanding the Concept:
Contraceptive methods are categorized based on their mechanism of action to prevent conception, including behavioral, barrier, and intrauterine approaches.
Step 2: Detailed Explanation:
- P. Lippes loop: This is a well-known example of a non-medicated Intrauterine Device (IUD) (iii).
- Q. Vaults: These are physical barrier methods used to block sperm from entering the cervix (i).
- R. Periodic abstinence: This is a natural method of family planning involving avoidance of intercourse during the fertile period (iv).
- S. Progestasert: This is an IUD that releases progesterone hormones to prevent pregnancy (ii).
[Image of different types of contraceptive methods]
Matching these results yields the sequence P-(iii), Q-(i), R-(iv), S-(ii).
Step 3: Final Answer:
The correct option is (C).