Yes, you can choose Botany as an optional subject even if you have already chosen Sociology as another optional subject.

Explanation:

1. Choosing Multiple Optional Subjects:
- The UPSC (Union Public Service Commission) allows candidates to choose more than one optional subject for the Civil Services Examination.
- This gives candidates the flexibility to select subjects that align with their interests and strengths.

2. Eligibility Criteria:
- The eligibility criteria for choosing optional subjects vary from one examination cycle to another.
- It is important to refer to the official notification or guidelines provided by the UPSC for the specific examination you are appearing for.
- As long as both Botany and Sociology are listed as optional subjects in the official notification, you are eligible to choose them.

3. Preparing for Multiple Optional Subjects:
- Choosing multiple optional subjects requires thorough preparation and dedication.
- It is essential to allocate sufficient time for the study of each subject, ensuring a balanced approach.
- Make a study schedule that allows you to cover the syllabus of both subjects effectively.
- It is advisable to create a study plan that includes regular revision and practice to strengthen your understanding of both subjects.

4. Overlapping Syllabus:
- While Botany and Sociology are distinct subjects, there may be some overlapping concepts or themes.
- It is important to analyze the syllabus of both subjects and identify any areas of overlap.
- This can be advantageous as it allows you to reinforce your understanding of shared concepts and potentially save time in preparation.

5. Study Material and Resources:
- Gather the necessary study material and resources for both Botany and Sociology.
- Consult recommended textbooks, reference books, previous years' question papers, and online resources.
- Make use of EduRev, a reliable online platform that offers a wide range of study materials, notes, and practice questions for various subjects, including Botany and Sociology.

Conclusion:
- In summary, you are allowed to choose Botany as an optional subject alongside Sociology.
- Ensure that you meet the eligibility criteria specified by the UPSC for the examination you are appearing for.
- Create a study plan that allows you to effectively cover the syllabus of both subjects and make use of appropriate study materials and resources.