Engineering

No it is better to do BCA only, then choose upto your interest.

99 percentile means there are about 99 percent people (who appeared in the test) who scored less than you.

Yes,you can do B.Tech. after polytechnic. Most of the colleges allow lateral entry for polytechnic Diploma holders.

GATE for PSU.AMCAT for jobs in IT sector.
CAT for entrance to management courses.

You can consider following colleges:
BITS Pilani
Anna University
College of Engineering
Indo Global Group of Colleges
Netaji Subhas Institute Of Technology
UEM, Jaipur
Delhi Technological University
IEM, Kolkata
D Y Patil International University Akurdi, Pune
Manipal Institute of Technology

Hello Srinivas,
PG Diploma is considered equivalent to a post-graduate degree, however, even by many, it is not included as a degree course. It is a Diploma course. MA is a post-graduate degree. Moreover, journalism and mass communication together is a wide topic that will cover all the aspects. It is not just limited to journalism only. You will have more options (other than a journalist).

Yes, there is lateral entry in all the esteemed university.

https://www.shiksha.com/distance-correspondence-m-sc-chp
Here is the complete blog on this.

https://www.shiksha.com/college/zakir-husain-college-of-engineering-and-technology-Aligarh-50219/admission
Here is the complete admission procedure for getting admission in this institute.