Diploma

Hello Shubham,
Yes, you can get admission in IIT's based on your diploma. But remember, diploma is considered as equivalent to 12th & hence you will have to score at least 75% in diploma besides clearing JEE Mains and then JEE Advanced.

Distance B.Tech can be pursued at your convenience, especially if you want to be employed and wish to acquire another qualification. There a many Universities who offer distance B.Tech. Please search on shiksha for the names. The duration of the course for diploma holder is lateral entry and is not 2 years with 2 semester each.
The students can download the application form and prospectus online or offline filled up and sent to the institution.
Average fees for the course: 1.5 to 2 lacs

Eligibility conditions to seek admission in GGSIPU for doing B.Tech lateral entry is as follows:
Candidate should have completed three-years Diploma in engineering in any of the following branches of
engg./ technology with a minimum of 60% marks in aggregate from any recognized Diploma awarding institute/ university/ board recognized by AICTE.
You are not eligible to appear in CET for B.Tech lateral entry.

Yes, you can, but in distance mode.

Hi Urvashi,
Institutes to pursue Diploma in brand management:
Asian Institute of Management
Indian Institute of Planning and Management, Delhi
Madhya Pradesh Birla Institute of Management, Bangalore
Indian Institute of Management, Kolkata, Ahmedabad, Bangalore, Lucknow and Indore
Indian Institute of Social Welfare and Business Management, Kolkata
Bharatiya Vidya Bhavan, Kolkata
International Institute of Retail Management, Delhi
MISB, Bocconi-Mumbai
FAD International, Mumbai
SP Jain Institute of Management and Research, Mumbai
Xavier Institute of Management and Entrepreneurship, Bangalore and Chennai
MICA, Ahmedabad