MBA/PGDM

According to me, the best college among these is CBIT, as per its placement records, infrastructure and surrounding, and knowledge. Hence I would suggest you go for it.
All the best.

The average package will be around 4-7 LPA in DBS.

Hello Anshu,
Doon Business School is one of the best business schools of Dehradun, this college is a great place to earn a wide exposure of skills and practical knowledge, and the placements are also good
All the best.

Check the below link for all the information about CAT-2018 (like Dates, Question Papers, Pattern, Syllabus, Results, Admit Card, Answer Key, Cut Off, Application Form). This year's CAT will be conducted by IIM-Lucknow:
https://www.shiksha.com/mba/exams/cat

Any good MBA college accepts CAT/any other MBA entrance exam score. It is better to apply through CAT score. You can prepare well for CAT and other entrance exams. A score around 80+ percentile in CAT is good enough to get into a decent B-School. For direct admissions, you can check with the respective college's administration you are looking for.

It's a fast-paced (1-year in duration) course designed for working professionals. ISB is one of the best B-Schools offering this course.

Indian School of Business (ISB) is a reputed college in Hyderabad. They also intake foreign students. You need to have a valid GMAT score and crack the interview round.