Hi there.

To become an IAS officer one has to crack the UPSC examinations which are considered as one of the toughest examination in all of our country.

First of all, UPSC occurs in 3 stages.

1. Preliminary examinations

2. Mains examination

3. Interview round

Preliminary examination are MCQ type and needs to be qualified to be able to sit for Mains which is a broad written paper. Final selection would be based on your Marks of the Maibs exam and Interview. Preliminary examination marks wouldn't be considered for final selections.

For being eligible to write the UPSC examinations one has to have a graduation degree in any subject from any recognized university. As in the question you have mentioned JNU, I'm assuming that you wanted to mean to get into JNU for completing your graduation. If you have science steam then you can surely complete your B.Sc in any subject that you are passionate about.

But, in my opinion, for people who want to pursue it is always better to take those subjects in graduation that would help you in your preparation of the UPSC examination. This isn't a necessity but just a suggestion. It's better to go for subjects like History, Geography, Political Science, Economics etc.

You can choose any of your interested subjects. A lot of doctors and lawyers, even engineers and bankers have successfully cracked the UPSC examinations.

For the JNU admission process kindly check the link below:

https://www.google.com/amp/s/university.careers360.com/articles/jnu-admission-process/amp

You'll have to crack the entrance examination conducted by JNU every year to get admission there. Please check details in the above article linked depending on your subject.

It is highly advisable to start your preparation from the first year of graduation itself. Start small, take one step at a time, clearing your basics first would be very helpful. For that, start with NCERTs of class VIII to XII of all major subjects like History, Geography, Political Science and Economics. Make a habit of the reading the newspaper daily, for this purpose, "The Hindu" is highly recommended.

After clearing your basics, move on to Indian Polity by Lakshmikant. Stay updated with current affairs and start reading the Yojana Magazines regularly.

Start taking help from Unacademy and Mrunal's blog.

Slowly build up the momentum of your studies and start solving previous years questions. Having regular practice of writing answers would increase your speed and vocabulary. Be sure to read good essays, usually, the columns of popular newspapers and try incorporating the writing style in your own way of writing essays.

Not just that, come up with strategies and be determined. A period of 2 years is said enough for preparing if the person is motivated and hardworking and dedicated.

Set small and achievable goals. Talk to seniors who are already training at LBSNAA. You can find them easily on Instagram and Facebook. Their insights would prove really helpful.

Hope this helps you.

Good luck!