Maths Spl

Hi Ashwini,
Yes, you can. You can apply for admission by clicking on this link:
http://www.correspondenceeducation.org/application/

You can apply for CAT this year. Its application forms will be out in the month of August-September. You need to score a good percentile in CAT to get eligible for top B-Schools of India. CAT 2018 will be conducted in the last week of November and the first week of December. Apart from this, you can apply for other MBA entrance exams like IIFT NMAT, CMAT XAT and SNAP. You can refer to the below link for various exam dates:
https://www.shiksha.com/engineering-exams-dates.

Have faith in yourself and don't be confused. Study hard and get better results. You should never get demotivated, follow your passion.

Yes, we can say this because geology has a better scope ahead in future. So, you can do B.Sc in Geology.
Good luck.

Of course. But, I think, you have to apply for admission. But currently Spot Counselling is ongoing. Check LU's website to know more.

Hi,
If you're commerce student, you can do BBA or B.Com. Good luck!

Why not?
If B.Tech is your passion, then you definitely should go for B.Tech, but your admission chances is quite low that is no big problems, you should check other college.