MAT

Being an alumni, I would not like to recommend you ITS, PGDM. If you scored 90%, you can opt for colleges like BIMM-Pune, IIRM-Hyderabad, NIBM-Pune, and XIME-Kochi. If you scored 97%, you can chase SIMSREE-Mumbai, PUMBA-Pune, XIME Bangalore, KJSMAIYA, and JBIMS. Choose your area of interest (sales, financial sales, core finance, HR) and then choose the college according to that.

http://www.indiaeducation.net/management/mat/mat-institutes-in-kolkata.aspx
Kindly visit the given link to know about the B-Schools in Kolkata accepting MAT exam scores.

You can appear for NPAT in late months of class 12th. But, you should begin preparing from now. If you are planning to appear for MAT, then you are too early to think about it. You need to be a graduate first.

Yes, they will. Check out this link:
https://www.shiksha.com/mba/course/master-of-business-administration-badruka-college-post-graduate-center-kachiguda-hyderabad-88257
All the best.

Yes Mayank, you can get admission.

Hii Abhishek,
50 % is a decent safe becnhmark, so you should know in core finance job profile maximum mnc demands 55-60% and for sales few top FMCG giants and pharma company demands 50% in/upto grduation.
Kindly check this with directly placement officer that which type of job profile /company does not demand this to avoid any dicey situation in future during placement.
Feel free to write.

For CAT exam, you need to have a bachelor's degree with at least 50%. If you belongs to ST, SC, 45% marks will be needed to be eligible for CAT.
But, you can give MAT exam.
Study online for MAT or CAT or any test preparation, check here https://goo.gl/JEyStu
It is very affordable and easily accessible for students.

You can refer to the following link:
https://www.shiksha.com/mba/ranking/top-mba-colleges-in-india-accepting-mat/2-2-0-0-306