Exam

No, you cannot appear for IIT after this much time. You need to do some other course.

Go for the branch in which you are interested. Think about the college after that. You have to learn that for 4 years. If you choose any non-interesting branch, then you can't do good. Go for interest, not for placements. Don't worry about new or old. You can apply for jobs outside also. So, choose

Applicants who have passed B.Com one-year with minimum of 50% marks are eligible to get admission in B.Com (Hons), while for admission to B.Com (general) course, the minimum eligibility criteria is candidates must pass 10+2 with any 4 of these subjects Mathematics/ Statistics/ Commerce/ Accountancy/

Here is the State wise list of Castes that come under OBC category (CENTRAL),. If you do not send a valid OBC-NCL certificate, you will be considered under the General category. From April 2012, Socially and Educationally Backward Classes-Minorities (SEBC-M) isan additional category under OBC-NCL. S

Im really not sure about this,as far as I know it may be in between 8.5k - 24.5k for OC/general category in EAMCET(considering all the four branches).
As you know, this ranking preference changes according to gender and caste grade, it fluctuates every academic year.
If your rank satisfies here, you w

Registration for Architecture Aptitude Test commences after the announcement of IIT-JEE Advanced results. Eligibility Criteria for AAT Only the applicants who successfully qualified JEE Advanced can appear for AAT to get admission to B.Arch. Hence you are not allowed for AAT examination because you

Sorry, but you won't be able to get into NITs with this rank. For NITs, you need a minimum CRL rank for 50 thousand. Above all, ranks are for eligibility of JEE Advance. Go for private colleges or either go for a drop.

For qualifying JEE Mains (which means to be eligible for JEE Advanced) the minimum marks are as follows:
IN 2018:
Common Rank List - 74
OBC-NCL - 45
SC - 29
ST -24
IN 2017
Common Rank List-81
OBC-NCL- 49
SC - 32
ST - 27
Cutoffs for admissions in various NITs, IIITs, are available at:
https://josaa.nic.in/josaao

Maybe you can get but you know categories play important role in that you check previous year results and then you can compare it will help you to choose the course according to you need.