Concept:
Intrauterine devices (IUDs) are classified based on their mechanism:
• Non-medicated IUD (no drugs)
• Copper-releasing IUD (spermicidal effect)
• Hormone-releasing IUD (progesterone/LNG based)
• Oral contraceptive pills (non-IUD category)
Step 1: Match Lippe's loop.
It is a non-medicated IUD.
\[
\boxed{A \rightarrow I}
\]
Step 2: Match Multiload 375.
It is a copper-releasing IUD.
\[
\boxed{B \rightarrow II}
\]
Step 3: Match LNG-20.
It is a hormone-releasing IUD (levonorgestrel based).
\[
\boxed{C \rightarrow III}
\]
Step 4: Match Saheli.
Saheli is an oral contraceptive pill.
\[
\boxed{D \rightarrow IV}
\]
\[
\boxed{\text{A-II, B-I, C-III, D-IV}}
\]