Economics

This subject doesn't need to be studied during the 11th and 12th grade. Background economics is always a big bonus for insight regarding dynamic, financial management, economic principles, helping and creating favourable conditions of operation; still, this is not needed because entrepreneurship can be carried by almost everybody even out from the economics curriculum itself - most people who were very good at managing businesses learned in either sciences, art, commerce streams. What is important for entrepreneurship includes a good understanding of your chosen industry, creativity and problem-solving, and your ability to adapt to conditions in the market. And, ultimately, practical experience, networking, and learning are often more important than specific academic subjects.

The choice of going to IITs and IIMs would depend on the type of goals and focus area your research is targeting to go for a Ph.D. in Economics:

1. IITs- Indian Institutes of Technology They mainly have technical and engineering-centric disciplines but also strong, high-quality Ph.D. programs in Economics, especially under the Humanities and Social Sciences departments. IITs like IIT Bombay and IIT Delhi are interdisciplinary, bringing together economics in combination with quantitative techniques and computational ones. With an interest in applied economics, a focus of econometrics, or data analysis work, IITs provide all that with the research-intensive environment, with technology being an added impetus supported by innovation Institutes of Management): IIMs like IIM Ahmedabad, IIM Bangalore, and IIM Calcutta will have specialised Ph.D.s in Economics, which include departments for economics and business policy. 

For aspiring DU aspirants planning to pursue subjects like Mathematics, Statistics, Economics, and Physics; the following are the steps to be followed:

1. Behold Eligibility Criteria
Mathematics/Statistics/Physics: These courses have most probably Science subjects with Mathematics taken at Class 12. Since you have appeared for Class 12, check for the subjects.
Economics: Delhi University may not require mathematics up to the 12th level for an aspirant at BA (Hons.) Economics, but it proves to be useful.
Finalize that your subjects match the requirements as you will see in DU official norms for the specified courses.

2. Appear For CUET (Common University Entrance Test)
CUET is the entrance examination for DU and a few other colleges. Since you belong to West Bengal and have already appeared for Class 12, you have to fill out the application form CUET entrance examination to get admission.
Exam Subjects: Pick the most appropriate subjects within CUET which are similar to the ones studied in Class 12. Those aiming toward courses, like Economics, Mathematics, and Statistics, usually have to compete in specific segments of the entrance examination.
Registration: Visit the official website of CUET (CUET Official Portal) to create your application and register for this specific exam. Ensure that the application is done on schedule.
3. Prepare for the CUET Now
Now that the class 12 results aren't available yet, your CUET basis prep has to use the learned subjects so far.
4. Keep in Touch with DU Admission Process
The counseling and admission process will then be declared by DU soon after CUET results are out. Stay tuned to the official options of DU to get requests on merit lists, counseling dates, and seat distribution.