Exam preparation requires a well-structured study plan that covers all the necessary topics and also includes time for practicing answer writing. Answer writing practice is crucial for UPSC exams as it helps in improving writing skills, time management, and also enhances the understanding of the subject matter. Here is a recommended study plan that includes time for practicing answer writing:

1. Set Clear Goals:
- Identify the subjects and topics that need to be covered.
- Divide the syllabus into manageable sections and set a timeline for completion.

2. Daily Study Routine:
- Allocate fixed hours for studying each day.
- Begin with the subjects/topics that require more attention.
- Allocate at least 1-2 hours for answer writing practice.

3. Subject-wise Preparation:
- Start with a thorough understanding of the concepts and theories of each subject.
- Refer to standard textbooks and UPSC recommended resources for comprehensive study.
- Take notes and make concise summaries for quick revision.

4. Practice Answer Writing:
- Select questions from previous year papers, sample papers, and mock tests.
- Set a timer and attempt to answer the questions within the stipulated time.
- Focus on structuring the answers, presenting arguments, and providing relevant examples.
- Evaluate your answers critically, identify the areas of improvement, and work on them.

5. Analyze and Review:
- Regularly evaluate your performance in answer writing practice.
- Seek feedback from mentors, teachers, or peers.
- Identify the common mistakes, improve upon them, and learn from your weaknesses.

6. Revision:
- Allocate specific time for revision of each subject on a regular basis.
- Make use of revision techniques like flashcards, mind maps, and mnemonic devices.
- Focus on revising important topics, formulas, and current affairs.

7. Mock Tests:
- Take full-length mock tests to simulate the actual exam scenario.
- Analyze your performance, identify the areas of improvement, and work on them.
- Attempt the mock tests within the prescribed time limit to improve speed and accuracy.

8. Stay Updated:
- Read newspapers, magazines, and online portals to stay updated with current affairs.
- Take notes on important events, government policies, and international relations.
- Relate the current affairs with the subjects for a holistic understanding.

In conclusion, a well-structured study plan that includes dedicated time for answer writing practice is essential for UPSC exam preparation. Following the above recommendations will help in improving writing skills, time management, and overall performance in the exam. Remember to stay consistent, motivated, and focused throughout the preparation journey. Good luck!