Class 12-science

Yes, there is programme called dual degree, you can join this course for Bachelor's+ Master's degree. College provide this degree with 5 year duration. Good luck.

I would like to suggest you please let her decide what she wants to do as per her interest. And, if she can improve more, then she can opt for any NEET coaching so that she can crack NEET exam or any other medical entrance exams like pharmacy, nursing, bio tech. And, if she is not interested in medical then she can opt for BCA+MCA, BBA+MBA, B.Tech agriculture. But, please let her decide.

It all depends on your interest and command over Maths and Science. IPMAT isn't a very tough nut to crack, but you require a decent hold over the two. Secondly, IPM is not a BBA+MBA programme instead it is a BA (foundations in management) + MBA programme.
All the Best.

Yes, one student can give max. 3 times JEE Mains.

Here you for the complete list of the college of game deign
https://www.shiksha.com/it-software/game-design-chp.

Yes, you can apply for commerce college.

Hi Naveen,
No, there is no difference in the cut offs score for the both the students. You will get same cut off of B.A. Courses at Delhi University, even if you are from Science streams. That doesn't matter at all. Go ahead and take admission. Best of luck.

Hi Rohit,
Yes, you can go for B.Sc. In computer Science, even if you don't have computer in class 12th board. Many people are already doing this. There will be no problem at all.
Best of luck.

It would be better to do it in India than abroad. You will get more opportunities here and will be cost effective too.