In my opinion, he Verma would be best for concept clear and increasing understanding level.

Introduction:

Choosing a reference book for physics can be a crucial decision for students. It is essential to select a book that provides a clear understanding of the subject matter, covers a broad range of topics, and offers comprehensive explanations. Among the various options available, one book that stands out is "University Physics" by Young and Freedman.

Key Features:
- Comprehensive Coverage: "University Physics" covers all major branches of physics, including mechanics, thermodynamics, electromagnetism, optics, and modern physics. It provides a holistic approach to the subject, ensuring that students have a thorough understanding of the key concepts.

- Clear Explanations: The book excels in its ability to present complex topics in a clear and concise manner. It uses diagrams, illustrations, and examples to enhance the understanding of difficult concepts. The language used is accessible, making it suitable for students at various levels of proficiency.

- Problem-solving Approach: "University Physics" emphasizes problem-solving skills, which are crucial in physics. It includes a vast array of practice problems, ranging from basic to advanced levels. Detailed solutions are provided for selected problems, helping students grasp the methodology and techniques required to solve them.

- Updated Content: The book is regularly updated to incorporate the latest advancements and discoveries in the field of physics. This ensures that students receive accurate and up-to-date information, making their learning experience more relevant and meaningful.

- Supplementary Resources: Young and Freedman's "University Physics" is accompanied by a range of supplementary resources, including online materials, practice quizzes, and interactive simulations. These resources further enhance the learning process and provide additional practice opportunities for students.

Conclusion:

In conclusion, "University Physics" by Young and Freedman is an excellent choice for a physics reference book. Its comprehensive coverage, clear explanations, problem-solving approach, updated content, and supplementary resources make it a valuable tool for students. By investing in this book, students can develop a strong foundation in physics and excel in their academic pursuits.