Common mistakes in answering questions in Animal Husbandry and Veterinary Science optional subject include:

1. Lack of understanding the question:
- Students often fail to fully comprehend the question being asked, resulting in incorrect or irrelevant answers.
- It is crucial to carefully read and analyze the question before attempting to answer it.

2. Insufficient knowledge:
- Many students struggle with a lack of in-depth knowledge in specific areas of animal husbandry and veterinary science.
- It is essential to have a thorough understanding of the subject matter to provide accurate and comprehensive answers.

3. Failure to provide examples:
- Students often neglect to support their answers with relevant examples from real-life scenarios or research studies.
- Including examples helps to demonstrate a deeper understanding of the concepts and adds credibility to the response.

4. Incomplete or vague answers:
- Some students tend to provide incomplete or vague answers, leaving out important details or not addressing all aspects of the question.
- It is crucial to provide a complete and well-structured response that covers all relevant points.

5. Lack of clarity and organization:
- Students may struggle with expressing their ideas clearly, leading to confusion or misunderstandings.
- It is important to present the answer in a well-organized manner, using clear and concise language to convey thoughts effectively.

6. Overuse of technical jargon:
- While it is important to demonstrate knowledge of the subject, excessive use of technical terminology can make the answer difficult to understand.
- It is advisable to strike a balance between using appropriate terminology and explaining concepts in simpler terms.

7. Neglecting to review and revise the answer:
- Students often fail to review their answers for errors or omissions before submitting them.
- It is crucial to allocate sufficient time for reviewing and revising the answer to ensure accuracy and clarity.

In conclusion, students should strive to understand the question, possess comprehensive knowledge of the subject, provide relevant examples, give complete and well-structured responses, use clear language, balance technical terminology, and review their answers thoroughly. Avoiding these common mistakes will help students excel in Animal Husbandry and Veterinary Science optional subject in UPSC exams.