Introduction:
There are several online platforms and apps that provide practice questions for optional subjects in the UPSC exam. One such platform is EduRev, which offers a wide range of study materials, practice questions, and mock tests for various optional subjects.

EduRev:
EduRev is a popular online learning platform that caters to the needs of UPSC aspirants. It provides a comprehensive collection of study materials, practice questions, and mock tests for optional subjects, including detailed explanations and solutions. Here are some key features of EduRev:

1. Vast Question Bank:
EduRev has a vast question bank that covers a wide range of topics from various optional subjects. The platform offers thousands of practice questions, allowing aspirants to practice and improve their understanding of the subject.

2. Topic-wise Questions:
EduRev organizes practice questions in a topic-wise manner. This helps aspirants to focus on specific areas and strengthen their knowledge in those topics. Each topic consists of multiple questions, which are accompanied by detailed explanations and solutions.

3. Mock Tests:
EduRev also provides mock tests for optional subjects, which simulate the real exam environment. These mock tests help aspirants assess their preparation level and identify areas where they need to improve. The platform offers a variety of mock tests with different difficulty levels, allowing aspirants to gradually increase their performance.

4. Performance Analysis:
EduRev offers a detailed performance analysis feature that provides insights into an aspirant's performance in practice questions and mock tests. It highlights areas of strength and weakness, helping aspirants to focus on their weaker areas and improve their overall performance.

5. User-friendly Interface:
EduRev has a user-friendly interface that makes it easy for aspirants to navigate through the platform and access the required study materials and practice questions. The platform also allows users to bookmark questions, create custom tests, and track their progress.

Conclusion:
EduRev is an excellent online platform that offers practice questions for optional subjects in the UPSC exam. It provides a vast question bank, topic-wise questions, mock tests, performance analysis, and a user-friendly interface. Aspirants can make the most of these features to enhance their preparation and improve their chances of scoring well in the exam.