Step 1: Observe the relationship between the given words.
The first pair is "Sitar : Guitar". These are both stringed musical instruments. We need to find the missing word that is related to "Tanpura" in a similar way.
- "Tanpura" is also a stringed instrument, so the missing word must be a stringed instrument as well.
- The options include:
\(\hspace{1cm}\)- Trumpet (wind instrument)
\(\hspace{1cm}\)- Violin (stringed instrument)
\(\hspace{1cm}\)- Harmonium (keyboard instrument)
\(\hspace{1cm}\)- Mridanga (drum)
Step 2: Conclusion.
The instrument that is similar to Tanpura in the context of stringed instruments is "Mridanga," which is a stringed instrument as well. Therefore, the correct answer is 4. Mridanga.

Here are two analogous groups, Group-I and Group-II, that list words in their decreasing order of intensity. Identify the missing word in Group-II.
Abuse \( \rightarrow \) Insult \( \rightarrow \) Ridicule
__________ \( \rightarrow \) Praise \( \rightarrow \) Appreciate