Diploma

Go for Master's if you can afford else for cost effective solution go for George Brown. A 1-year programme allows for a year stay back. However, a 2-year program offers a three year stay back.

Dear Sagar,
Ramkrishna Shilpamandir (Belur Math) and Central Calcutta Polytechnic will be the ideal option for you.

Dear friend,
Amity University is a good private university. It has its own rules and regulations. So, if you are willing to pursue a degree course the Amity is definitely a good choice. You cannot get admission in Amity University to pursue B.Tech after completing a Diploma course as Amity doesn't offer lateral entry admissions.

Dear Harshit Chouhan,
Normally, among the students, aviation management means something crazy but originally, in India, aviation management is not having that much growth. In fact, this specialisation is very narrow, therefore, prefer general BBA and later you can go for MBA from top notch institutes. Still, you can choose the best college.
All the best.

Hi,
Definitely you will get a lateral entry for BCA in IP University. I have provided you the website link below:
https://www.google.co.in/url?sa=t&source=web&rct=j&url=http://www.bteclub.com/lateral-entry-2013/190-lateral-entry-to-btech-programmes-for-diploma-holders-cet-code-128.html&ved=0ahUKEwi_y7eJjs7SAhVMwrwKHSjIA14QFggaMAA&usg=AFQjCNFDaI9-DsdrvhBZtl-SGKY2ZMU6pA&sig2=_lZuOkk8_ng414PEpAJc-g

Hi,
There is no clear guideline from UGC or AICTE for the Distance mode B.Tech programme. So, for the safer side, you must plan your education especially in engineering (B.Tech) programme in regular mode only from a recognized university or institute.
Through regular mode you would knowledge, practical experience, interaction with companies and guidance from faculties.