However, I can provide you with some general information about BPSC (Bihar Public Service Commission) mains exam and preparation tips.

BPSC conducts the mains exam as a part of the selection process for various administrative positions in the state of Bihar. The mains exam consists of written papers that assess the candidate's knowledge and understanding of various subjects.

To understand the BPSC mains exam pattern and prepare effectively, it is important to refer to previous year mains question papers. These papers can give you insights into the exam format, types of questions asked, and the level of difficulty. Analyzing these questions and their solutions can help you identify important topics and develop a strategy for your preparation.

To obtain BPSC previous year mains question papers with solutions, you can follow these steps:

1. Visit the official website of BPSC (www.bpsc.bih.nic.in).
2. Look for the "Previous Year Papers" or "Old Question Papers" section on the website.
3. Search for the BPSC mains question papers for the specific year you are interested in.
4. Download the question papers and their solutions, if available.
5. Analyze the questions and solutions to understand the exam pattern and improve your preparation.

In addition to referring to previous year question papers, it is advisable to have a comprehensive study plan and follow these tips for BPSC mains preparation:

1. Understand the syllabus: Go through the BPSC mains syllabus thoroughly and understand the topics and sub-topics that need to be covered.

2. Create a study schedule: Plan your study time effectively by allocating specific time slots for each subject and topic.

3. Study material: Gather relevant study material such as textbooks, reference books, and online resources to study from.

4. Focus on conceptual understanding: Instead of memorizing facts, focus on understanding the concepts behind them. This will help you answer questions more effectively.

5. Practice mock tests: Solve mock tests and previous year question papers to improve your time management skills and get accustomed to the exam pattern.

6. Revision: Regularly revise the topics you have studied to reinforce your understanding and improve retention.

Remember, consistent and dedicated preparation is key to performing well in the BPSC mains exam. Good luck with your preparation!