The review of the related study is important while undertaking a research because

It avoids repetition or duplication
It helps in understanding the gaps
It helps the researcher not to draw illogical conclusions
All of the above

The correct answer is D. All of the above.

A review of the related study is important while undertaking a research because it avoids repetition or duplication, helps in understanding the gaps, and helps the researcher not to draw illogical conclusions.

  • Avoiding repetition or duplication

One of the main purposes of reviewing related studies is to avoid repeating or duplicating previous research. By understanding what has already been done, researchers can focus on filling in the gaps in knowledge and developing new and innovative research.

  • Understanding the gaps

Another important purpose of reviewing related studies is to understand the gaps in knowledge. By identifying what is not yet known, researchers can focus their efforts on answering these questions and contributing to the body of knowledge.

  • Avoiding illogical conclusions

Finally, reviewing related studies can help researchers avoid drawing illogical conclusions. By understanding the existing research, researchers can better understand the context of their own research and avoid making assumptions that are not supported by evidence.

In conclusion, reviewing related studies is an essential part of the research process. It helps researchers avoid repetition or duplication, understand the gaps in knowledge, and avoid drawing illogical conclusions.