Eligibility for CA Foundation Exam:
To apply for the CA Foundation Exam, candidates must meet certain eligibility criteria set by the Institute of Chartered Accountants of India (ICAI). These criteria include:

1. Educational Qualification:
- Candidates must have completed their 10+2 examination or equivalent from a recognized board.
- There are no minimum percentage requirements for eligibility.

2. Registration with ICAI:
- Candidates are required to register with the ICAI for the CA Foundation course.
- Registration can be done online through the ICAI website or offline by submitting the registration form to the nearest ICAI branch.

3. Study Period:
- Candidates must undergo a minimum study period of four months from the date of registration to be eligible for the exam.
- The study period is important to ensure that candidates acquire the necessary knowledge and understanding of the subjects.

Applying for Multiple Professional Courses:
Candidates are allowed to apply for multiple professional courses simultaneously, including the CA Foundation course. However, it is essential to ensure that the study and exam schedules of these courses do not clash. Here's what you need to keep in mind:

1. Time Management:
- If you have already applied for another professional course, it is crucial to manage your time effectively to balance your studies for both courses.
- Prepare a study schedule that allows you to allocate sufficient time to each course and ensures you cover the syllabus adequately.

2. Exam Dates:
- Check the exam dates for both courses to ensure there are no clashes.
- If there is a clash in the exam schedule, you may need to prioritize one course over the other or seek alternative arrangements with the respective institutes.

3. Preparation Strategy:
- Develop a clear preparation strategy for each course, considering the study materials, coaching classes (if any), and self-study time required.
- It is advisable to focus on one course at a time to avoid confusion and maximize your chances of success.

Conclusion:
In summary, you can apply for the CA Foundation Exam even if you have already applied for another professional course. However, it is essential to manage your time effectively, check for any exam date clashes, and develop a clear preparation strategy for both courses. Balancing your studies and prioritizing your commitments will be crucial to succeed in both courses. Good time management and dedication will help you excel in your chosen professional paths.