Study Abroad

A lot of Indian students choose to pursue an Advanced Diploma or Certificate courses upon completion of their 12th. English proficiency tests such as IELTS TOELF or PTE may be required.

I think apart from having an excellent academic record, you are required to have a GMAT. Check the entry requirements of the universities you are looking at.

USA is a hub of STEM programs, thus there are ample of universities that will offer you Computer Science courses. Universities usually have specific scores that they need in a particular section in the GRE exam. I personally visited Edwise for counseling and they gave me a good idea of the scores I would require. You could visit them.

Yes, you are eligible to appear in second stage. Usually, the qualifying marks for General category students for each of the papers MAT and SAT is 40 percent and 32 percent in the case of SC/ST/physically challenged candidates. The NTSE Stage 1 result is declared usually between January & March. Good luck!

You should practice in India after PG but you will have to qualify a test organized by MCI to practice as a doctor in India. Yes, you are correct you can go head with this.

Yes, it is good but if you want to practice in India, you will have to pass a test conducted by MCI.

BBA+ MBA seems a very lucrative programme. Based on my personal experience and insights from my friends who are sufferers of BBA+ MBA, I would not recommend you to go for such a programme. Below are the reasons for to validate my point:
1) A BBA (3 years ) and a MBA ( Full Time 2 years programme ) has more value in Corporate compared to the integrated ones.
2) You will have time to go for MS or MBA in other streams, which you will figure out during your BBA term.
3) MBA is more about networking. If you go for Integrated MBA, you will have a limited network. You can expand if you go for separate programs.

B.Sc. Agriculture is a four year degree course after which you would be eligible for Vacancy with Government of India. And companies dealing in Food and Argo Product. There is a very good scope for this degree in current scenario. There are colleges like Lovely professional University, BHU etc. Who have a very good course structure and Placement opportunities for Agriculture students.

https://www.ntsehelpline.com/scert-kerala-released-official-mat-sat-keys-for-ntse-2019-stage-1/
Visit the above given link to download the respective papers.