CBSE 10th

The eligibility criteria of Diploma in Pharmacy at Techno India University is given below.
1. 10 + 2 Science Pass with Physics, Chemistry and Biology or Mathematics.
2. The first of the three year Degree course in Science.
3. Intermediate Examination in Science with Physics, Chemistry and Biology or Mathematics.
4. Pre Degree Examination in Science
5. No upper age limit.
So from above you may go with Science stream with the following subjects as Physics, Chemistry and Biology or Math for 10+2.

Based on your profile you will have to score near perfect CAT score and do extremely well in GDPI to get admission in any of the top IIMs.

Hi,
If you have an interest in programming and developing, then you should definitely go for CSE. CSE is the best course to enter into IT sector. IT Companies tend to hire candidates from CSE beaches than any other branch. So, it depends upon you, if you have an interest in learning programming and developing then go for CSE. It is one of the best courses. All the best.

Yes, you do stand a high chance of getting a call from Welingkar as they consider an overall score of your GDPI, your past academic records and also your percentile. Now, converting the call all depends on you.

Kindly predict your college through this college predictor. The rank predicted might not be accurate, but it certainly gives an idea to the aspirant.
https://www.shiksha.com/college-predictor

You have decent academic score. 95+ percentile from New IIMs and baby IIMs, MDI-Gurgaon, SP JAIN, FMS, NITIE Mumbai, IMT Ghaziabad, IIT Bombay, IIT Kanpur, IIT Madras etc. also consider CAT percentile.
So, there are chances of getting call in 2nd and 3rd round.